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.
Questions about how Craft handles a request.
Commercial Forms Plugin from Barrel Strength Design.
folksonomies for your entries, users, and assets.
Conditional will perform different actions depending on some condition.
a statement executing some code repeatedly (forever or till some condition exists it)
Questions specific to the Craft 2 version of Craft CMS; avoid using for questions applicable to all or multiple versions.
Variable a symbolic name associated with a value that may be changed
Questions related to Craft 3 Yii Module Development
Questions about Craft's capabilities, or how it might be used broadly to address the needs of a project.