The Spotted Lanternfly is an invasive species native to Asia. In 2014 it was found in Pennsylvania, and has since spread to multiple counties
If you see a spotted lanternfly, it's imperative to immediately report it online or via phone by calling 1-888-4BADFLY. Especially if you are not inside the quarantine zone.
What else? Kill it! Squash it, smash it...just get rid of it. In the fall, these bugs will lay egg masses with 30-50 eggs each. These are called bad bugs for a reason, don't let them take over your county next.