To track your website visitors, you can use either free or paid analytics tools such as Google Analytics, Simple Analytics(https://www.simpleanalytics.com), Plausible Analytics (https://plausible.io), or Rybbit (https://rybbit.com).
You can choose the solution that best fits your needs. All of these tools can be added via Custom Integrations by inserting a small tracking code into the header or footer of your website depending on the instructions of the corresponding tool. In the case of simply analytics it's the BODY section.
Below you’ll find a short video showing how to install Simple Analytics, which offers a free plan and allows you to receive visitor reports automatically via email.