https://www.promptshelf.blog/blog A curated library of AI prompts by profession and use case. Copy-paste prompts for teachers, marketers, developers, HR, and more. en-us undefined (PromptShelf Editorial) undefined (PromptShelf Editorial) Mon, 15 Jun 2026 00:00:00 GMT https://www.promptshelf.blog/blog/how-to-use-chatgpt-for-excel https://www.promptshelf.blog/blog/how-to-use-chatgpt-for-excel How to use ChatGPT for Excel in 2026: write formulas, fix errors, build pivot tables, and clean data faster, with copy-paste prompts and a tested example. Mon, 15 Jun 2026 00:00:00 GMT undefined (PromptShelf Editorial) ChatGPTExcelspreadsheetsproductivitydata analysis