We get asked what is alt text weekly by Ottawa clients — here's the real answer with current 2026 examples. Text that describes an image, used by screen readers and search engines when an image fails to load.
**Alt Text** — Text that describes an image, used by screen readers and search engines when an image fails to load.
Alt text serves three purposes: accessibility, image SEO, and graceful failure handling. Best practice: describe the image factually, include relevant keywords naturally, keep under 125 characters, never stuff keywords. This term appears frequently in modern SEO documentation and in the Search Console help center; understanding it well prevents common configuration mistakes that cost rankings. If you're implementing this concept on your own site, the documentation linked at the bottom of this page covers the technical specifics in greater depth.
Alt Text sits in the **On-Page SEO** layer of search engine optimization. Understanding it correctly is essential for anyone working on technical SEO, content strategy, or executing campaigns at the level required to compete in modern search results.
The single most common mistake practitioners make with alt text is treating it as a tactic in isolation, rather than as one signal among hundreds that Google evaluates. Done well, alt text contributes to compound ranking gains; done poorly, it creates technical debt that handicaps every future SEO investment. Searching "what is alt text"? This page is structured for both quick scans and deep reads. If you're implementing this concept on your own site, the documentation linked at the bottom of this page covers the technical specifics in greater depth.
When implementing alt text, the highest-leverage practices are:
- Treat alt text as a foundation, not a bolt-on. Get it right at the architectural level rather than retrofitting later. - Audit existing implementations regularly — Google's interpretation of alt text evolves with each algorithm update. - Validate technical implementations using Google's official tools (Search Console, Rich Results Test, PageSpeed Insights) before assuming success. - Document your approach so future site changes don't accidentally break alt text configuration. - Measure outcomes against actual ranking and traffic data, not vanity metrics. Searching "what is alt text"? This page is structured for both quick scans and deep reads. This term appears frequently in modern SEO documentation and in the Search Console help center; understanding it well prevents common configuration mistakes that cost rankings.
The most frequent errors we see clients make with alt text:
1. **Treating it as a checkbox item.** Alt Text is rarely a one-time setup — it requires ongoing maintenance as content, code, and Google's standards evolve. 2. **Implementing without measurement.** Without tracking the impact of alt text changes, you can't distinguish what's working from what's noise. 3. **Following outdated advice.** SEO tactics around alt text have changed substantially over the years — guides published before 2023 frequently recommend approaches that are now ineffective or actively harmful. 4. **Over-optimizing.** Excessive focus on a single signal almost always backfires. Alt Text works in concert with other ranking factors. Searching "what is alt text"? This page is structured for both quick scans and deep reads.
These terms are closely related to alt text and worth understanding in context:
- **Image SEO** — Optimizing images for both search engine crawlers and page performance. - **Web Accessibility** — Designing websites usable by people with disabilities (vision, motor, cognitive). - **Schema Markup** — Structured data vocabulary (schema.org) that helps search engines understand page content. Practical tip: most teams encounter this concept when troubleshooting indexing or ranking issues — knowing the canonical definition saves hours of misdiagnosis. If you're implementing this concept on your own site, the documentation linked at the bottom of this page covers the technical specifics in greater depth.
If you're trying to improve your site's performance with respect to alt text, the most useful next step is a no-pressure technical audit. We'll examine your current implementation, identify gaps, and walk through the specific improvements that would deliver the highest ROI for your business.
Book a free strategy call or read our broader SEO methodology to see how we approach work like this for on-page seo clients across Canada and the US. Practical tip: most teams encounter this concept when troubleshooting indexing or ranking issues — knowing the canonical definition saves hours of misdiagnosis. This term appears frequently in modern SEO documentation and in the Search Console help center; understanding it well prevents common configuration mistakes that cost rankings.
Text that describes an image, used by screen readers and search engines when an image fails to load.
Yes — alt text is part of the On-Page SEO layer of search engine optimization, and it influences how search engines crawl, index, and rank your pages.
Implementation depends on your tech stack and CMS. For most sites, alt text is best handled at the template level so it applies consistently across new content.
Google's official documentation is the authoritative source. We've also covered alt text in our broader SEO content — see related terms below.