Again, here you go: What is a 301 redirect vs a 302 redirect?

Instead of creating multiple threads asking single questions, consolidate your questions into one thread instead.

301 redirection is permanent redirection Old url into new url . 302 redirect is temporary redirect old url into new url .

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302 and 302 both errors are used to show that the web pages are moved to other locations. 301 redirect means the page has moved to new location permanently and 302 redirect means page is moved to another location temporarily.
You can use 301 redirect errors for SEO purpose also, it helps to get all the authority and ranking of the old site as well.

302 is used when you have to shut your website for short time period.

If it's for SEO purposes, you need to go with 301 not 302.

301 is permanent redirection use in SEO for canonical issue Solution.

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301 Redirection is Permanent Redirection and 302 Redirection is Temporary Redirection.