The official Microsoft Excel documentation can be found at the [Excel functions (by category)](https://support.microsoft.com/en-us/office/excel-functions-by-category-5f91f4e9-7b42-46d2-9bd1-63f26a86c0eb) webpage. It contains explanations for all Microsoft Excel functions, with examples, and mentions to which versions of the software they apply.

Further tutoring on using Excel can also be found on e-learning websites, such as Udemy or Coursera.
spam fails_task lang_mismatch pii not_appropriate hate_speech sexual_content quality toxicity humor helpfulness creativity violence