Whatever the reason, in order to stop receiving notifications from a specific location, go to the location within the app and then click the heart symbol to stop following it.
If you want to turn off notifications for the entire Lovvett app, go to Notification preferences in the app settings. You can turn them on and off at any time!
Also, please consider that most phones have a notification settings section where you can choose how notifications are delivered to you and from what apps.