If you have access to your website's code, you can add the Facebook pixel yourself. Simply place the Facebook pixel base code (what you see when you create your pixel) on all pages of your website. Then add standard events to the pixel code on the special pages of your website, such as your add-to-cart page or your purchase page. For full step-by-step instructions on adding the Facebook pixel to your site, visit the Help Center.
What stands true, though, is that after a week of retargeting, you may want to stop focusing on immediate purchases and aim for longer-term relationships with your website’s visitors. That is, you should try to keep in touch with your potential customers until they’re ready to convert instead of trying to convince them to convert and then giving up when they don’t. Student Ask Mark Zuckerberg "Is Bachelor's degree necessary for success ?"
Retargeting can help your business and/or product stay relevant while customers may be looking for other options. It’s a great way to give your audience a second, third or even fourth chance to purchase your product. Running Facebook ads can help with the social growth of your business. If you want to be successful at Facebook advertising campaigns, I would suggest starting small. You want to A/B test and measure the results from your ads to find that winning formula that yields success.