Whether or not you're home during your booking is up to you! When you make a booking, you'll be prompted to leave security notes, so you can leave details on how to access the property there. If you feel comfortable leaving a key somewhere secure, there's no need for you to be home.
Alternatively feel free to stick around during the job, whatever you're most comfortable with is fine.
Don't worry! All of our professionals are vetted by us and as an extra precaution we only allow them to see the security notes 24 hours before the job is scheduled to go ahead.