Items like your passport, electronics, jewellery and other valuables should go in the most secure location, and many rentals provide safe storage. Sometimes, you might have to bring your own padlock, which provides extra security as only you know the code.
Article source: https://www.huffingtonpost.co.uk/entry/must-do-safety-checks-in-your-airbnb_uk_62d18bd1e4b0e140ec7a9bf4