An online form like the one below is an elegant solution to collect suggestions from your customers. You might either embed it somewhere on your website or link to it directly in the emails you send to your clients.
To duplicate this template and start editing it, click the button "Use this template". This particular form collects suggestions for the new business locations and thus features just two fields: City and State. If you're looking to collect other kinds of feedback and suggestions from your customers, you might replace those with one or multiple open-ended text fields.
You might have noticed that the Submit button's wording has been customized. Follow this simple tutorial to change its text and style.
Check out these other templates to get inspired: