The URL (web address) parents will use to make bookings in your site is the same one you would have been given to you when you were given the login details to your portal. It will look something like "examplecompany.aimyplus.com". You can use this same url as a link on your website or social media page. 

A good way to do this is through having a book now button which will link through to your aimy Plus url. 

NOTE: your URL does not need "www" at the start of it - this will cause the link to be wrong