Startup Idea: Excel Function Helper for Service Industry Professionals

Startup idea to develop a comprehensive software that provides a complete list of Excel functions, along with their descriptions and use cases, meant to assist service industry professionals in creating insightful reports and dashboards.

I work in the service industry and consistently have the use excel. When I am building new dashboards or tracking systems I find it hard to find a full list of available functions/processes to do the things I need. A list with a description and how it works would be helpful.