If you are a low-level seller and there are 5 to 10 campaigns running, You can optimize them on a daily basis. But, if you are a big seller and your account has 400 to 500 campaigns, it would be really difficult for you to optimize them regularly. You can create portfolios of all your products and optimize them accordingly. Try to optimize them after 7 to 14 days, so you have data for better optimization. If your campaigns’ ACOS is high, you can optimize those campaigns regularly or after 2 to 3 days to control their ACOS.
