Status OK - The file request was successful. For example, a page or image was found and loaded properly in a browser. Some poorly developed content management systems return 200 status codes even when a file does not exist. The proper response for file not found is a 404.
Moved Permanently - The file has been moved permanently to a new location. This is the preferred method of redirecting for most pages or websites. If you are going to move an entire site to a new location you may want to test moving a file or folder first, and then if that ranks well you may want to proceed with moving the entire site. Depending on your site authority and crawl frequency it may take anywhere from a few days to a month or so for the 301 redirect to be picked up.
Found - The file has been found, but is temporarily located at another URI. Although rare, 302 redirects are appropriate at times, but best if avoided due to the nature of some search engines handling them poorly.