How do I change the photo that shows up when I share my website on Facebook?

First, you must log in to your website's backend and then go to Pages. Hover your mouse over to the Home page and then click on Edit. Once it loads, scroll down until you see Featured Image in here, you will need to change or add a photo and then scroll up and click on Update. Then go to Facebook Debugger and debug your website's link and then click on Scrape Again. Facebook Debugger link - https://developers.facebook.com/tools/debug/