A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.
For questions about the maximum number of API calls per day, AKA 'quota'; 300 for unregistered apps, and 10000 for registered apps (per user when using personalized access tokens, per app otherwise).
Stack Exchange API Contest (Completed in August 2010). This is for questions about or entries therein.
An open source content management system (cms) for creating websites and blogs. Its functionality can be extended through functions of blocks of code, which can be grouped into separate executables ca…
**OBSOLETE** version of the API. Decommissioned in May 2014.
Microsoft's "Universal Windows Platform" (UWP) for app development.
Questions about tools for: the favorite question feature, the favorite tags feature, or extending "favoritism" to other features.
a way to get additional attention for a question by offering some of your own reputation for great answers.
For Stack Exchange applications which interact with Twitter. General software development questions about Twitter can be asked on Stack Overflow; end user questions on Web Applications Stack Exchange,…
For BUG REPORTS, not feature-requests. Use this when the API doesn't return data when the docs (or similar calls) say it should. This tag may be eliminated in the future.
For scripts and applications that interact with the Stack Exchange Data Explorer (SEDE).