The person assembling the monthly report is almost never junior. It is the ops manager, the finance person or the owner, because assembling it takes knowing where everything lives and which numbers to distrust. Which means the ritual eats two of the most expensive days in the company, every month.
And the output is fragile. One stale export or one row pasted off by one, and the management meeting spends twenty minutes debating a number that was simply wrong. The report lands late, the discussion is about the data instead of the decisions, and next month the ritual repeats.
What the automation does
The data gets pulled on schedule from where it lives (the shop, the accounting system, the ad platforms, the spreadsheets), reconciled, and written into the same report layout your team already reads. Discrepancies between sources are flagged, not papered over. The human contribution shrinks to the part that was always the real work: reading the result and writing the three sentences of commentary that explain what happened and what to do about it.
What changes
Assembly drops from about two days to half an hour of review. The report is ready on the first of the month instead of the tenth, the numbers stop being a debate, and the senior person who did the pasting gets two days a month back. Over a year, that is roughly a full working month of senior time.
The other ways to fix this
A full BI implementation will also solve it, in a few months, at several times the cost, and someone still has to maintain it afterwards. Delegating the pasting down saves senior hours but multiplies the paste errors. Keeping the ritual is the default choice, and it costs two senior days a month, indefinitely. Automating the assembly keeps your report exactly as it is, minus the two days.