How to Lock Cells in Excel: The Critical Step Everyone Skips
Checking Locked in Format Cells does nothing by itself. Cells are locked by default already; only protecting the sheet from the Review tab actually enforces it.
AI Apps Script for Google Sheets: Check It Before You Run
A wrong formula affects one cell. A wrong script can rewrite ranges, delete sheets and send email as you. Here is what to look for before clicking run, and the quotas that break scripts at scale.
Google Sheets Formula AI: Three Routes Compared
Three routes produce essentially the same formula. What differs is what each costs and how much you have to type. On Business Starter one of them is not available to you at all.
Gemini in Google Sheets: Which Plan You Actually Need
Gemini is included with Workspace, metered in Sheets, and absent from Business Starter entirely. Business Plus costs $8 more per user than Standard and has exactly the same 100-a-month allowance.
ChatGPT in Google Sheets Without Paying for an Add-On
The code is the easy part. Google gives each custom function thirty seconds to return, so filling one down a thousand rows fires a thousand simultaneous calls and fills the column with errors.
How to Understand an Inherited Excel Spreadsheet
Auditing a workbook is read-only, which makes it the safest use of AI in Excel. Map structure first, then hunt the four hazards that fail silently: hardcoded values, dead links, hidden sheets and stale ranges.
AI Pivot Table Summaries: Where They Quietly Go Wrong
A column called Amount usually includes refunds as negatives. AI assumes it means revenue received, produces arithmetically perfect output describing something else, and nothing flags the difference.
How to Clean Data in Excel With AI Without Corrupting It
A cleanup applied to five thousand rows in one pass is also a mistake applied to five thousand rows in one pass. Which cleanups you can undo, which destroy the original, and the workflow that keeps everything recoverable.
How to Write Excel Formulas With AI (And Check Them)
Generating the formula is the easy part. A range that starts one row too low produces a plausible wrong number that nobody notices for a quarter. Here is how to ask well, and the four-minute check that catches it.
Excel COPILOT Function Retired: What to Use Instead
Microsoft’s documentation states the Excel COPILOT function stops being available on 14 September 2026, and the web rollout was cancelled. If you built anything on it, this is a deadline rather than a heads-up.