@Elen4570 Exactly. A preapproval which does not get taken up by the enquiring guest will not have a negative impact on your ratings and statistics. It will only have a positive affect as it reflects the timing of your response to the guest, and the positive response that you give. It is ok for a guest to enquire about your accommodation and others too at the same time usually. At their end they will be getting encouragement from Airbnb to contact more than one Host, in case their first enquiry is unsuccessful. The more they check before booking, the better. It should lead to guests eventually learning which listings suit them best. They are not always shopping around for the cheapest deal, there are usually a number of other factors which will directly affect their decision to request a firm booking.
Always put safety and and matching your hosting to the correct travellers and youbwill have less cancellations and a better overall experience.
Above all never accept a booking which you do not feel is a good match, or that you are not willing to 100% commit to. Be professional evaluating guest enquiries, be solid in your commitment and you will be rewarded with lots of responsible, cobsiderate and safe guests.
Best regards Christine from Wombat's at Glenbrook.