What is Alt Text?
The text alternative describing an image for screen readers and parsers. One of the most common detectable accessibility failures, and part of every audit baseline.
Related terms
Image SEO
Making images retrievable and fast: descriptive filenames, alt text, captions, responsive sizes, lazy loading, and accurate dimensions to protect CLS.
Accessibility Checker
Automated WCAG scanning (contrast, labels, alt text, empty controls) as an audit baseline. Machine checks catch the common failures; manual review covers what tools cannot detect.
Multimodal Search
Search that mixes text, images, and voice as inputs or outputs. Alt text, descriptive captions, transcripts, and structured data decide whether non-text content is retrievable.
On-Page SEO
Optimizing individual pages: titles, headings, content depth, internal links, images, and schema. On-page work decides relevance once technical SEO has made the page reachable.
Title Tag
The clickable headline in search results and the strongest on-page relevance signal. Google rewrites most titles, so clarity and completeness beat rigid length rules.
Meta Description
The optional summary that can become the result snippet. Absence is not a penalty and Google rewrites most descriptions, so prioritize valuable pages where controlled wording earns clicks.