Go to the Extension Manager in your Typo3 backend and switch to the "Get Extensions" view in the top drop-down menu.
Refresh the list of extensions, then search for Userlike to get our latest extension.
Click the button to import and install the Userlike Typo3 extension.
Go to the page management and select the page where you want to add the Userlike plugin. Then click on the "Content" button to add a new element.
Select "Plugins" and the Userlike Widget from the plugin list.
Configure the plugin by pasting the secret key of the Userlike Widget you want use on your Typo3 page. Then save the plugin.
Congratulations. Userlike will now appear on your website.