What is the role of RSS (XML format) files, whether they are output by themselves, or by using external software. Solution

What is the role of RSS (XML format) files, whether they are output by themselves, or by using external software. For example, csdn also has an RSS feed. I don't know what the function is. RSS is a means of providing information, and a dedicated RSS client is used to browse information. RSS (simple information aggregation, also called aggregation content) is a format for describing and synchronizing website content. RSS can be one of the three explanations: What is the role of ReallySimp RSS (XML format) files, whether it is output by itself, or by using external software.
For example, csdn also has an RSS feed.

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RSS is a means of providing information, and a dedicated RSS client is used to browse information.
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RSS (simple information aggregation, also called aggregate content) is a format for describing and synchronizing website content. RSS can be one of the following three interpretations: Really Simple Syndication; RDF (Resource Description Framework) Site Summary; Rich Site Summary. However, these three interpretations refer to the same Syndication technology. RSS is widely used in online news channels, blogs, and wiki. its major versions include 0.91, 1.0, and 2.0. Using RSS subscriptions can get information faster. The website provides RSS output, which helps users get the latest updates to website content. Network users can read the website content that supports RSS output without opening the website content page by means of RSS-supported aggregation tools on the client.