To place a retargeting pixel or tag on your website, you will need to create an account with a retargeting platform such as Google Ads, Facebook Ads, or AdRoll. Once you have created an account, you will be given a code snippet that you need to place on your website. You can typically do this by adding the code to the header or footer of your website pages.

Once you have placed the retargeting pixel or tag on your website, it will start collecting data about your visitors. This data can include information such as the pages they visited on your website, the products they viewed, and the items they added to their cart.

Once you have collected enough data about your visitors, you can start creating retargeting campaigns. With these campaigns, you can show targeted ads to your visitors when they visit other websites that display ads from the retargeting platform you are using.

For example, if you are an e-commerce business, you could create a retargeting campaign that shows ads for the products that visitors viewed on your website but did not purchase. This can be a very effective way to remind visitors about your products and encourage them to return to your website to complete their purchase.

Some tips for creating effective display retargeting campaigns:

• Target your ads to specific audiences. For example, you could target ads to visitors who viewed a specific product category on your website or who added items to their cart but did not purchase them.
• Use relevant ad copy and images. Your ads should be relevant to the pages that visitors viewed on your website or the products they viewed or added to their cart.
• Create a strong call to action. Tell visitors what you want them to do, such as "Visit our website" or "Buy now."
• Track your results and optimize your campaigns. Pay attention to your campaign metrics, such as click-through rate and conversion rate, and make adjustments to your campaigns as needed.

Display retargeting can be a very effective way to reach your target audience and drive sales. By following the tips above, you can create effective display retargeting campaigns that will help you achieve your business goals.