The Dashboard is built to let you zoom from the whole client down to one ad group without losing your place.
Account / client: the top line, summarising every campaign beneath it.
Campaign: expand a client to see its campaigns, each with its own counts and savings.
Ad group: expand a campaign to see its ad groups, where the actual recommendations sit. Ad groups also show how their search terms cluster into related word patterns, so you can see themes at a glance.
Click a client row to expand its campaigns.
Click a campaign row to expand its ad groups.
Open Review at whichever level you want to act.
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Reading the dashboard
Breakdown, savings, actions, autopilot status and last run.