One essential question you will need to answer for your business (and for the investor) is how you are planning to reach your customer! You want to tell them about the great product you built.
The customer acquisition slide is a description of this process. First off, you should present your investors how you define your potential customers and on which marketing channel you want to reach out to them.
For example, our target audience is "founders between 20 and 30 that just graduated". After that, you should describe your channels or strategy (e.g., long-term SEO / short-term: PPC).
Next, you can give a brief overview of your customer acquisition costs (CAC). This is the amount of money you need to spend to find a customer that is paying for your product. Additionally, you can give a brief overview of the return you expect from these customers. This return is called "return on investment" (ROI), which determines how much money you will earn by one single customer.
If you have any numbers that might help you explain the data mentioned above, use them! It also shows that you already have a little traction.
