Once you've set up the Facebook pixel, the pixel will fire when someone takes an action on your website. Examples of actions include adding an item to their shopping cart or making a purchase. The pixel receives these actions, or events, which you can view on your Facebook pixel page in Events Manager. From there, you'll be able to see the actions that your customers take. You'll also have options to reach those customers again through future Facebook ads.
It is important to have clarity on what you are looking for from each tool so that you can calculate your return on investment. For example, if a customer responded to a Facebook ad and purchased a $20 product and you spent $5 to advertise, your return on investment would be $15. Over time, if you can, also track the total lifetime value of a client for even more accurate returns. What if Gary Vee is wrong? | Important advice for beginning online brands
However, businesses that aren’t online-based, but have multi-page or content-rich websites that would find user data insightful, should also use retargeting. For example, a winery has two main types of consumers: those interested in tours and tasting and those interesting in hiring their venue for private events. The winery could use retargeting to segment site visitors by their interest, and then display ads specific to each of those user’s interests.