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
Another way to explain the 303 redirect is where it indicates that a previous resource has been "replaced" within a domain or Web setup. These situations may involve Common Gateway Interface (CGI) scripts. CGI, which has largely been replaced by other kinds of programming languages and methods, involves sending data back and forth between a server and application. As the Internet became a more functional network, this technology has enabled a lot of dynamic Web functionality.
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.