Use this tag for questions related to automating MS Office Products ( Excel, Outlook, PowerPoint, Access, Word, Project, etc. ). Automation in this context means the use of an external software, not an MS Office product, to execute a variety of operations on MS Office products. For questions about macros use the relevant tags for example "excel" and "vba". Do not use this tag if your question is not about automatic control.
Automation in this context means the use of computer systems to execute a variety of operations such as word processing, spreadsheet calculation, database manipulation, etc. without user interruption.
If you have a specific programming question about Excel or Word (or any other product from the MS Office package) and it is not about automating it via external software then use tags like excel, ms-word, vba, etc.