If your business model means that you travel to your audience or your audience travels to you, it’s a good idea to restrict the size of your distribution area. This is easily done via the 'Range' parameter, where you can restrict your distribution area by either 'Driving Time' or 'Radius' from your business.
When it comes to target audience or income bracket, you should conduct some research to gain insights into your existing customer base or the markets you wish to move into. This will help you to focus on the most likely prospects for your campaign.