In the video, Mark, an Airbnb ambassador, is giving advice to Jev, a new Airbnb host. He discusses the importance of managing guest expectations through clear communication and setting realistic standards. He suggests using Airbnb's quick replies and scheduled messages to provide consistent information to guests, such as access codes, house rules, and local recommendations. He also advises on what to provide for guests, including linen, toiletries, and some basic food items like tea, coffee, and milk. He emphasizes the importance of cleanliness and ensuring the property matches the photos provided. Finally, he encourages Jev to enjoy the experience of hosting and meeting new people.