Indexability is whether a page can be processed and included in a search engine’s index.
It matters because organic search compounds over time when pages are technically accessible, useful, differentiated, and connected to real search intent. Clear SEO terminology also helps teams avoid shortcuts that create long-term risk.
Example
A publicly accessible page can still contain a noindex directive that asks supported engines not to include it in results. Review response headers, page directives and canonical signals rather than assuming a 200 response means the page is indexable.