To track sales in affiliate marketing, pixels are small bits of code you place on a website to monitor user actions. First, get the pixel code from your affiliate program or network. Then, paste it into the website's code, usually on the thank-you or confirmation page that appears after a purchase. This way, the pixel records when a sale happens after someone clicks your affiliate link. Make sure the pixel is set up correctly by testing it with a sample click and purchase. Check your affiliate dashboard to confirm the sale is tracked. Pixels help you see which links are working and which aren't, so you can focus on what brings results. Always ensure the website owner is okay with adding the pixel. What are your thoughts on using pixels for tracking?