Hi Rudi and Alicia! Here are a couple tips for getting to know your clients..
The best way to get to know them is by talking to them. It should be a priority for you to always find out where your clients found you, and what they think of your services.
So depending on how many clients you have, and how much time you can put into it, a great way to get this info is by sending them a personal email, or even calling just to check in.
Hopefully you have some analytics tools in place, because that can help with identifying the acquisition channel for each new client.
If you have too many clients and not enough time, then mail platforms like MailChimp or GetDrip are great for keeping in touch with prospects and customers! Don't be afraid to ask them what they think, all feedback can be used to better your products and services :)

Good luck!!!