Definition - What does 303 Redirect mean?
A 303 redirect is a response to an HTTP status code 303, which is also called a "See Other" status code. Experts describe the specific type of redirect as a response to a request for a Unified Resource Identifier (URI) that identifies a real-world object.
A 303 redirect may also be called HTTP 303.
Techopedia explains 303 Redirect
Part of the basis of use for the 303 redirect comes from a concept called the Semantic Web, which is supported by the World Wide Web Consortium. The Semantic Web helps to develop one common standard for data sharing across the Web.
A 303 response also has its own syntax; in a 303 redirect, the W3C specifies that a request for a different URI should use a GET method to access the desired destination. Experts also know that in some cases where browsers do not understand the 303 redirect, a 302 status code may be interchangeable.