SEO is search engine optimization, the practice of improving a website so it can earn more relevant visibility from search engines.
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
An SEO project might clarify a service page, connect it to relevant project examples and correct a blocked indexing directive. The team then tracks qualified organic visits and inquiries, without assuming any single change guarantees a particular search position.