How will I advertise for users who have connected to the wi-fi? Is this how it will look technically? And an interesting topic I had in mind: what if on the basis of the same system to make advertising alerts next to access points?
What do you have in mind? Notifications will come to users when they connect to the wi-fi?

Oh) although yes, you are right. I didn't think something about the fact that before the connection to the Wi-Fi users have no Internet, respectively, and notifications can not come. And when the user connects to the wi-fi, the alerts will no longer make sense
