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Usage guidance, also known as a tag wiki excerpt, is a short blurb that describes when and why a tag should be used on this site specifically.

A feed is a mechanism for users to receive updated data (usually structured) from data sources. It is commonly used by real-time applications in point-to-point settings and for news on the World Wide Web.

Client applications can use data feeds for a variety of purposes, such as news distribution, media monitoring, product listings, or financial market information.

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