When planning your online marketing campaigns, the first step is to determine what you want to achieve and how you will measure success. This will vary depending on your business model, industry, and target audience. For example, you may aim to increase brand awareness, generate leads, drive sales, or improve customer loyalty. To track ROI, you should consider metrics such as cost per acquisition (CPA), customer lifetime value (CLV), return on ad spend (ROAS), conversion rate (CR), and bounce rate (BR). CPA measures how much you spend to acquire a new customer, CLV evaluates the revenue generated over the customer's relationship with you, ROAS measures how much revenue you earn for every dollar spent on ads, CR measures how many visitors complete a desired action on your website or landing page, and BR indicates how many visitors leave without taking any action.