Meta tags matter because they're the direct communication channel between your page and search engines. The title tag is a confirmed ranking factor—Google uses it to understand your page topic and displays it as the blue clickable headline in search results. The meta description doesn't affect rankings directly, but a compelling one can double your click-through rate from 2% to 4%, which indirectly signals relevance to Google. Beyond those two, several meta tags control how search engines handle your pages. The robots meta tag tells crawlers whether to index a page or follow its links—critical for preventing duplicate content issues or keeping staging environments out of search results. Canonical tags solve duplicate content by pointing all variations to one preferred URL. At Ottawa SEO, we see sites lose 20-30% of their potential traffic when canonicals are misconfigured across product variants or paginated content. The viewport meta tag isn't a ranking factor itself, but it enables mobile responsiveness, which absolutely is. Open Graph and Twitter Card tags don't help rankings but control how your content appears when shared socially, affecting traffic from those channels. Here's what actually moves the needle: - Title tags: Keep them 50-60 characters, front-load your target keyword, make them compelling enough to earn clicks - Meta descriptions: 150-160 characters, include a clear value proposition and call-to-action - Robots/noindex: Use strategically on thin content, parameter URLs, or admin pages - Canonical: Point all duplicates to your preferred version, especially important for e-commerce Keywords meta tag is dead—Google hasn't used it since 2009, though Bing claims minimal consideration. We don't waste time on it. The tradeoff is that meta tags are table stakes, not a silver bullet. A perfectly optimized title tag on a page with thin content won't rank. But skip them or mess them up, and you're leaving 15-25% of your organic potential on the table. We audit meta tags in every technical SEO review because the fixes are quick and the impact is measurable within 2-4 weeks.