Website testing is the process of evaluating a website's functionality, performance, usability, security, and compatibility to ensure it works correctly for users.

It helps identify bugs, improve user experience, enhance security, increase website reliability, and support better search engine rankings.

The primary types include functional testing, usability testing, performance testing, compatibility testing, responsive testing, and security testing.

Manual testing is performed by human testers, while automated testing uses software tools to execute predefined test cases more quickly and efficiently.

A website should be tested before launch, after every major update, when adding new features, and periodically to maintain performance, security, and compatibility.

Yes. A well-tested website loads faster, performs better on mobile devices, reduces errors, and provides a better user experience, all of which positively influence SEO rankings.