Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to optimize google adwords [title] Define your goals. [step] Plan what you want to achieve with your ads, such as getting more clicks or a higher return on investment. [title] Refine how you organize your advertising campaign (s).

Ending1: [step] You can do this by simply configuring your advertising strategy. Plan and tailor your campaign to the application. Ending2: [step] Revisit the ad options offered by previous clients. Take note of new features/changes that you want to add with each add-on. Ending3: [step] By creating a detailed organizational structure, you can better focus on what areas need improvement in your ad content and placement. [substeps] Separate multiple campaigns by topic, such as brands or products. Ending4: [step] You may decide to lower citations or hit fewer keywords than what you wrote in your ad page. This will help you keep your ads streamlined and well organized.

Answer format: ending1/ending2/ending3/ending4