Semrush delivers domain-level visibility into competitor keywords, backlinks, ad spend, and content gaps. This tutorial walks through the platform's core modules for competitive intelligence, focusing on practical setup, interpretation, and how Canadian agencies prioritize findings without wasting hours on low-signal metrics.
Before opening Semrush, define who you're actually competing with. Many agencies waste effort analyzing sites that rank for overlapping keywords but serve different customer intent or business models. A Vancouver law firm specializing in estate planning shouldn't benchmark against Legal Zoom or a personal-injury practice just because both appear in generic legal SERPs.
Start with 3-5 direct competitors: businesses targeting the same geography, services, and buyer personas. Add 1-2 aspirational competitors if you're expanding into new service lines or markets. In Semrush, this translates to Domain Overview comparisons and shared keyword tracking. Avoid the trap of monitoring dozens of domains—you'll drown in data and miss actionable patterns. For Canadian SMBs, local competitors in Toronto, Montreal, or your metro matter more than national brands unless you're competing head-to-head for the same conversions.
Navigate to Domain Overview and enter a competitor's root domain. Semrush estimates monthly organic traffic, paid traffic, backlink count, and authority score. Treat these as directional indicators, not gospel—actual traffic can vary significantly based on brand search, direct visits, and Semrush's crawl coverage.
Focus on trends rather than absolute numbers. A competitor's organic traffic climbing month-over-month suggests fresh content, technical improvements, or successful link acquisition. Declining authority scores may signal lost backlinks or algorithm penalties. Compare traffic distribution: a site pulling 70% of visits from a handful of branded keywords has a different competitive moat than one with diverse long-tail rankings.
For Canadian agencies, check the geographic distribution tab. A competitor dominating Toronto but absent in Calgary or Montreal signals opportunity if you're building regional coverage. Authority Score is a Semrush proprietary metric—it correlates loosely with ranking potential but doesn't replace manual SERP analysis for your target keywords.
Under Organic Research, the Positions report lists every keyword a domain ranks for, along with estimated search volume, position, traffic share, and URL. This is where step-by-step competitor research starts yielding tactics.
Filter by position 1-10 to see their winning keywords. Export this list and cross-reference against your own rankings using Position Tracking or a separate rank tracker. Keywords where they rank top-3 and you don't appear at all are immediate content-gap opportunities—assuming the keyword matches your services and has commercial intent.
Use the 'Keyword Difficulty' column cautiously. A KD of 65 doesn't mean you can't rank if your domain already has topical authority and strong internal linking. Conversely, low-KD keywords with zero transactional intent won't move revenue. Sort by traffic estimate to prioritize keywords driving actual visitor volume, then validate search intent manually by Googling the term and reviewing the top-10 results. If the SERP is dominated by directory listings or forums, a well-optimized service page can displace them.
Backlink Analytics shows referring domains, anchor text distribution, and the specific pages earning links. For competitor research, focus on three views: referring domains, anchor text, and indexed pages by backlinks.
Referring Domains sorted by authority score reveals which high-value sites link to your competitor. Look for patterns: industry directories, local chambers of commerce, guest-post placements, resource pages, or partnerships. A Toronto agency earning links from multiple university .edu domains likely has scholarship or research content. A competitor with dozens of links from regional news outlets may be running an active PR campaign.
Anchor Text distribution tells you if they're building exact-match anchors aggressively (risky) or using branded and natural anchors (safer). Indexed Pages sorted by backlinks highlights their link magnets—tools, guides, data studies, or visual assets. Replicate the content format, not the exact asset. If a competitor's pricing calculator earned 200 links, consider building a complementary tool or a superior calculator with Canadian tax examples.
For .ca markets, filter referring domains by country to isolate Canadian backlinks. Local citations, provincial associations, and bilingual Quebec directories carry geographic relevance that offshore links lack.
Keyword Gap compares up to five domains and highlights keywords your competitors rank for that you don't. Enter your domain and 3-4 competitors, then filter for 'Missing' keywords—terms where competitors appear but your site is absent.
Sort by search volume and manually vet intent. Many 'missing' keywords will be irrelevant or informational queries that don't align with your services. Prioritize commercial and navigational terms where multiple competitors overlap, signaling validated demand. Export the list and map keywords to existing pages (quick content expansion) or net-new content briefs.
Backlink Gap follows the same logic: it shows referring domains linking to competitors but not to you. Filter for domains with authority scores above 40 and check their content type. If three competitors all have links from a Canadian marketing blog, pitch that blog with a unique angle or data. Avoid cold-outreach spam—review the site's editorial guidelines and recent posts to craft relevant pitches. Many link-gap opportunities are low-hanging fruit like unlinked mentions, outdated resource pages, or broken backlinks you can reclaim through reverse-engineering their acquisition tactics.
Advertising Research estimates a competitor's paid-search budget, top ad keywords, and historical ad copy. For service businesses running Google Ads, this uncovers which keywords competitors bid on and what messaging they test.
Under 'Positions' in Advertising Research, view the exact keywords triggering their ads, average CPC estimates, and traffic share. If a competitor bids heavily on high-intent keywords like 'emergency plumber Ottawa' but you're only targeting organic, consider a limited PPC test to capture immediate leads while your organic rankings mature.
Ad History shows copy variations over time. Analyze headlines and descriptions for pattern shifts—if a competitor pivots from feature-focused ads to urgency-driven offers, they may have found a higher-converting angle. Use this to inform your own ad tests or landing-page headlines.
CPC estimates are directional; actual bids fluctuate based on Quality Score, time of day, and auction dynamics. Treat spend estimates as rough budget guidance. For Canadian campaigns, CPCs in Toronto and Vancouver typically run higher than smaller markets, and French-language Quebec ads may have lower competition depending on your niche.
Position Tracking isn't purely a competitor tool, but configuring competitor domains within your tracking campaign lets you monitor relative ranking changes for shared keywords.
Set up a campaign with your target keywords, add competitor domains as comparison targets, and enable daily or weekly rank checks. Focus on keywords tied to revenue—lead-gen forms, quote requests, booking pages—rather than informational terms. If a competitor jumps from position 8 to 3 for a high-value keyword, inspect their page: did they add schema, refresh content, earn new backlinks, or improve page speed?
Semrush's 'Cannibalization' and 'SERP Features' tabs within Position Tracking help diagnose why rankings shift. A competitor may lose a featured snippet and drop traffic despite maintaining position 1, or a new video carousel could push everyone down. Track local pack visibility separately using the Location setting—ranking position 1 nationally means little if you're absent from the Local Pack in Ottawa or Montreal.
Avoid obsessing over daily fluctuations. Weekly or bi-weekly snapshots reveal trends; daily jitter is noise. Set up alerts for competitor ranking gains on your top-10 revenue keywords so you can respond tactically rather than drowning in rank-check emails.
The free version limits you to 10 queries per day and restricts access to full datasets—you'll see partial keyword lists, limited backlink data, and no historical comparisons. For ongoing competitor monitoring, a paid plan starting around 140 CAD per month unlocks Domain Overview, full Organic Research exports, Backlink Analytics, and Position Tracking. If budget is tight, use the free tier to validate which competitors matter, then subscribe for one month to pull comprehensive data and build a baseline you can reference quarterly.
Quarterly deep dives are sufficient for most industries unless you operate in a rapidly shifting niche like cryptocurrency or breaking news. Run a full audit every three months: Domain Overview changes, new ranking keywords, backlink profile growth, and ad-copy shifts. Set up Position Tracking to run weekly so you catch competitor SERP movements in real time for your priority keywords. Monthly backlink checks help you spot new link-building campaigns early, but avoid daily obsession—focus execution time on your own content and technical improvements rather than constant competitor surveillance.
Semrush estimates traffic by multiplying keyword rankings, positions, and estimated CTR curves—it's modeled data, not server logs. Actual traffic can differ significantly due to branded search, direct visits, social referrals, and Google's algorithm personalizing results. Treat traffic estimates as relative indicators: if Semrush shows a competitor's organic traffic doubling quarter-over-quarter, that trend is meaningful even if the absolute number is off by thirty percent. Use Domain Overview traffic as a directional signal to prioritize deeper investigation, not as a precise benchmark for board decks or client reports.
Keyword Gap automates the cross-reference and highlights missing, weak, strong, and untapped opportunities across up to five domains simultaneously. Manually exporting each competitor's keyword list and using spreadsheet VLOOKUP works but takes hours and risks human error. Keyword Gap's filters let you isolate commercial keywords, sort by difficulty, and exclude branded terms in seconds. The tradeoff is that Semrush's database may miss ultra-long-tail or newly emerging keywords, so complement Gap Analysis with manual SERP review for your top-converting terms to catch nuances the tool misses.
In Domain Overview and Organic Research, filter by country or use the Position Tracking location setting to isolate rankings for specific cities. National competitors often rank well due to domain authority but lack geo-optimized landing pages or local citations, creating opportunities for regional players. Build city-specific service pages, earn backlinks from local directories and chambers, and optimize Google Business Profiles. Use Backlink Gap filtered by Canada to find .ca domains linking to competitors—local backlinks carry more weight for geo-targeted queries than links from international sites. Track both national and local-pack rankings separately since the factors influencing each differ significantly.
Start with Organic Research to identify keyword gaps and validate that your competitors are actually competing for the same buyer intent. Once you've mapped content opportunities, shift to Backlink Analytics to understand how they built authority for those target keywords. In practice, keyword gaps without backlinks are easier to close quickly through content optimization, while backlink gaps require outreach, partnerships, or asset creation that takes weeks or months. Balance both: prioritize quick keyword wins to generate early traffic, then layer in link-building to sustain and improve those rankings over time as competition intensifies.