Start by reviewing what is already there before making any changes. Look at the campaign structure, the keywords being used, the budgets, and what results the account has been getting. Then have a clear conversation with the client about their goals, their target audience, and what they consider a good result. Many mistakes happen when a new manager rushes in and starts changing things without understanding why they were set up that way in the first place. What do you think is the most important thing to check when taking over someone else's Google Ads account?