To opt-in simply register on this site. This is a verified registration, you will be sent a confirmation email to return and complete the registration.
Once you start receiveing notification you will be asked confirm senders as well as topics of interest.
Important Opt-in fields
name and address,
zip code is used to send notification by geographic locations in the US.
Cell phone with GPS to receive notification including alerts and emergency based on where your cell phone is. For example, if you registered in Boston and you are traveling in Alabama, you will be able to receives alerts and notifications based on where you are.
Community community is determined 2 ways, 1st based on your registration zip code, 2nd based on your location.
Regardless, you can only receive what you want and nothing you don't want.