Really useful for figuring out how a page is going to look when pulled by Facebook, seem to need it pretty often. One little hidden tip is that you can use this Debugger to force Facebook to re-crawl (Scrape Again) your link, which is amazing if you published originally with incomplete or missing meta/images.
From FB: "You can use the Sharing Debugger to see the information that is used when your website content is shared on Facebook, Messenger and other places. The Batch Invalidator will let you refresh this information for multiple URLs at the same time. Open Graph markup lets you take control over how your website content appears to others. Learn More"
Stacks Accelerator
Forvo