What are the uses of 301 & 302 redirect?

A 302 redirect sends visitors to the specified site indicating a "302 Found" HTTP response. The HTTP 302 response code tells user-agents (including search engines) that the location has temporarily moved.

A 301 redirect can provide a long-term solution by pointing your domain names to business or affiliate sites. A 302 redirect points your domain name to a temporary page while you build your permanent website. The specific redirects help the search engines distinguish how long your website can

301 Redirection is Permanent Redirection and 302 is Temporary Redirection .

301 Redirection is Permanent Redirection and 302 is Temporary Redirection

301 is a permanent redirection and 302 temp redirection. if you are using 301 redirection then link juice pass on redirected domain but in case of 302 redirection link juice not pass.

When some times you change your domain or URL and have clonical issue you need to use 301 redirection so that user can reach to your preferred page.

Deftsoft Inc., Tell me why we need to move the content to another page, i mean what are the requirements when we need to move the content to another page?

Mainly 301redirection is used to signify the crawler that our content is permanently moved to new location and 302 is used for temporary pupose so that user will not be worried. Its use for our website is also very helpfull for Search Engines.
Thanks

301. I usually use it

If concerned about losing rankings due to a 301, the solution is not to change a domain, and not to become financially reliant on rankings.