To begin, you will want to log in to your account and under the "Settings" tab you can select "Custom Code".
There are three locations where you can add the Mouseflow tracking code on your site (we recommend installing the tracking code on the header or footer templates):
HTML Section (Add New Section > App Store & HTML > HTML).
Header (Settings > Advanced > Custom Code > Header).
Footer (Settings > Advanced > Custom Code > Footer).
Once you have selected the location you can enter in your Mouseflow tracking code found in your website settings.
Be sure to save your changes.