The verdict
If you are new to paid search, start with Google Ads and a small test budget. Make sure conversion tracking works and your landing page can convert. Without those, no tool will help.
Once campaigns are live, and especially if you also advertise on Microsoft or Meta, connect Adzooma. The free plan lets you try it on a real account at no risk. It is most useful when you have several accounts or little platform knowledge, because the findings are in plain language.
If you only run one small campaign and can check it by eye, you may not need Adzooma yet.