What is 301 Redirect?

Can anybody tell me What is 301 Redirect?

A 301 redirect is a permanent redirect from one URL to another. 301 redirects send site visitors and search engines to a different URL than the one they originally typed into their browser or selected from a search engine results page.

A 301 redirect is a permanent redirect from one URL to another.

typically a web browser redirect set by an admin or web admin user.

A 301 redirect is a direction that tells a browser: “The requested page is no longer available at the URL you have, you’ll find it at this new address”. The browser is then automatically redirected to this new URL and the desired, relocated content is performed. This happens so quickly users rarely notice a page has been redirected.
A 301 redirect is the most SEO-friendly way of transferring content from one URL (or web address) to another.