Ionos is a powerful hosting platform that allows you to create websites. If you are using their website builder, you can install Mouseflow directly on your page using the editor.
Log in to your IONOS account. If you are using the website builder you can head directly to the page builder.
Note: If you are using IONOS just as a hosting platform you can still install Mouseflow using your FTP credentials and following the instructions here.
Once the website builder has opened, select "Settings" from the left-hand menu.
A new sub-menu will appear. Select the tab titled "Head HTML".
Here, you will be presented with two options for inserting the Mouseflow tracking code found in your project's website settings.
Paste in your tracking code and save your changes.
Be sure to add your domain to the list of domains in the website settings to allow Mouseflow to record.