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 user interface elements (inputs, checkboxes, etc) that make up this site.
used to query the community on the specifics of a particular question asked on Operations Research or its Meta.
Lightweight, plain-text markup language used across the entire Stack Exchange network for post formatting.