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 Music Stack Exchange's ABCjs integration, which lets you write sheet music in posts.
Accessibility refers to the design of products, devices, services, or environments for people with disabilities.
designed to solicit opinions or best-practices on a particular topic, with the goal of reaching community consensus, often in the form of an approved ruling on an issue.