Http error: 303 See Other
The 303 See Other status code indicates that a resource has been replaced. This is often used in the context of SEO, when a page has been moved or renamed and the search engine needs to be updated.
The cause of a 303 code is typically a page that has been moved or renamed. The solution is to update the search engine with the new location of the page.
An example of a 303 code would be if a page was moved from http://example.com/page1 to http://example.com/page2. The search engine would need to be updated with the new location in order to find the page.
The difference between 303 and 301 redirects is that 303 redirects are temporary and 301 redirects are permanent. This means that a 303 redirect can be changed in the future, while a 301 redirect cannot.
If you’re not sure which type of redirect to use, it’s best to err on the side of caution and use a 301 redirect. That way, you can be sure that visitors will always be able to find the page they’re looking for.
RFC#: 7231 Section 6.4.4