what is difference 301 and 302 redirect

Many webmasters don't understand the difference between a 301 and 302 redirect. Unlike users operating browsers, search engines sense the different types of redirects, and handle them differently. A 301 redirect means that the page has moved to a new location, permanently. A 302 redirect means that the move is temporary. Search engines need to figure out whether to keep the old page, or replace it with the one found at the new location. If the wrong type of redirect has been set up, search engines may become confused, resulting in a loss of traffic.
 
Many webmasters don't understand the difference between a 301 and 302 redirect. Unlike users operating browsers, search engines sense the different types of redirects, and handle them differently. A 301 redirect means that the page has moved to a new location, permanently. A 302 redirect means that the move is temporary. Search engines need to figure out whether to keep the old page, or replace it with the one found at the new location. If the wrong type of redirect has been set up, search engines may become confused, resulting in a loss of traffic.

I've read some info, that site can be banned for 302 redirect, is it so? What are the reasons?
 
A 301, or permanently moved, is a redirect that carries and distributes in an absolute manner. You should use a 301 to signify to the crawlers that your content has moved permanently – as in forever.
A 302 status code means Found, or more commonly referred to as “temporarily moved.” This redirect doesn’t carry or pass the link value to the new location. What it does do is get the user to an appropriate location for you so that you aren’t showing them a broken link, a 404 page not found, or an error page.
 
The 302 redirect means that the page has been moved temporarily and other, 301, means that a new page has taken over permanently. Your site may need to determine if one was used by mistake.
 
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