Shoes on or off? Full recline or no recline? These are all questions we’ve asked ourselves when flying and likely have strong opinions about yet aren’t quite sure what is considered socially acceptable versus outright rude.

This summer KAYAK, the world’s leading travel search engine, is here to help set the record straight with the “Unspoken Rules of Air Travel.” Created in partnership with the AI-backed creative agency Supernatural, the new rulebook is available for curious travelers on KAYAK’s website and digital OOH ads that will run across five major airports including Dallas, LA, Miami, Boston and Pittsburgh for the summer. Check out the OOH ads here.

The brightly colored digital displays are sure to catch travelers on-the-go. One reminds travelers that “You’re not at the beach yet,” emphasizing that 56% of travelers say to keep your shoes on, and includes a QR code that takes travelers to a modernized seatback manual on the site. Another image reminds passengers it’s not necessary to clap at the end of the flight, with the message “we don’t come to your job and clap” and the disclaimer that 63% of the pilots can’t hear you anyway.

KAYAK, well known as the site where busy travelers can find the perfect flight, hotel or rental car in one place, completed the rulebook through conducting an extensive search across the Internet, leaving no digital stone unturned to uncover how Americans truly feel about travel etiquette.

“Travel etiquette is one of those things that is universally acknowledged yet frequently debated,” said Matt Clarke VP of NA Marketing. “Even within our own team at KAYAK, we couldn’t all agree whether it was or was not OK to recline your seat on a flight. So, we wanted to put an end to the debate once and for all. By launching these rules as summer travel really picks up, we hope to create a more enjoyable and agreeable summer travel experience for all.”