Professional services marketing, for when you're the whole practice.
I run a practice in:

You're a sole practitioner running your own law firm.
Before setting out on your own, clients came to you. Now, you have to find them.

You're a sole practitioner running your own accounting practice.
Winning new work used to be someone else's job. Now, keeping your pipeline full is on you.

You're a financial planner, either self-licensed or authorised rep.
There's no shortage of clients. Your job's now finding the ones worth servicing.