On the Meta Ads and Google Ads pages, open the account selector at the top:

  • Select all: selects all accounts shown in the list. It respects the search: type part of a name in Search accounts and click Select all to select only the matches.
  • Shift + click: click one account, hold Shift and click another. All accounts between the two are selected at once (or deselected, if the second one was already selected).

Then just open the accounts as usual. With several accounts open, the table and summary combine the data from all of them.

To avoid repeating the selection every time, use Save as group in the same selector: the group is saved and opens those accounts in one click.