There's various technologies used to help with this, including your device's IP address. You've probably noticed how Google Maps knows approximately where you are, well it's very similar on GivYo.
The best thing is this data brings you much quicker to discovering amazing things on GivYo to make life less ordinary. If you've set-up a hero board or wish list, GivYo will give you a nudge when something relevant is nearby. Let's say the art of trapeze is on your wish list, when a GivYoer lists this nearby you'll receive an alert. Just awesome eh.
You can switch off notifications on the GivYo App at any time, just click the gear settings icon.