Things like visiting travel sites without actually purchasing anything (FB can see everything 😬).
Typically I will turn on the Trip Consideration feature and just include the typical demographic of the customer.
I highly recommend trying it out to anyone who has a business in the travel niche.
If you want more FB ads info, join my email list ==> goo.gl/eocZf6
If you have any questions please let me know.
Thanks,
AA