Auto-completion is a feature in (La)TeX source code editors that predicts the (La)TeX commands close to the command being typed to eliminate the need for typing frequently used commands. If your question concerns the functionality of specific editors (e.g., {texstudio}, {emacs}), include them as tags as well.

Auto-completion is a feature offered in (La)TeX source code editors that predicts the (La)TeX commands close to the command being typed to eliminate the need for typing frequently used commands.