Summarize data with formulas

Summarize data with formulas in Google Sheets — with the four heights of help laid out: do it now, make it easier for the next person to accept, work out the right move when you are stuck, and learn the pattern so it stops coming back.

4prompt heights
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The four heights

The same task, four distances: today's deadline, the next reviewer, the stuck moment, the pattern.

Execute — do the immediate task

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I need a one-sheet summary that shows monthly active users, revenue, and average session length for…
I need a one-sheet summary that shows monthly active users, revenue, and average session length for the last 12 months. Put the totals and month-over-month percent change in row 2, use the raw data in columns A through D, and check formulas for missing rows before I send this to the CEO on Friday.

Improve — make it easier to accept

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Before I hand this summary to the product lead, make the key numbers impossible to miss: move total…
Before I hand this summary to the product lead, make the key numbers impossible to miss: move total revenue and percent change to the top, highlight any month with revenue down more than 5%, and show the formula that produces the average session length so an engineer can validate it quickly.

Decide — diagnose the stuck moment

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I exported last month’s events into columns A to D and the summary suddenly shows a big revenue…

I just pulled raw event logs and the summary shows a revenue spike

I exported last month’s events into columns A to D and the summary suddenly shows a big revenue spike that isn’t in the raw rows. Priya in product will assume I mis-aggregated. I don’t know whether a stray duplicate row or a SUM range error caused it. What’s the fastest diagnosis and safest fix so I can lock the sheet and tell Priya the truth?

Become — change the pattern

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Every time a fresh export lands, I spend 30–60 minutes hunting broken ranges and duplicate rows…

I keep rechecking formulas after every import

Every time a fresh export lands, I spend 30–60 minutes hunting broken ranges and duplicate rows before the deck update. I’m burned out and miss deadlines. Where should I change my habit so imports are trustworthy within ten minutes and I stop doing the same manual checks?

Next to this one

Other spreadsheet work people do in Google Sheets.

Every task here came from the work, not from a feature list — which is why the prompts name what you want done and never the button that does it. The tool changes; the work does not.
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The rest of the map

Same library, five ways in.