To start using the widget, the code needs to be installed on all pages on your website where you want the widget to be visible. Install before the <\body> tag at the bottom of the page code.
The easiest way to achieve this is by installing the code in your website's footer, as the footer is on all pages.
We'll send you the code when we first set up your widget settings, but if you ever need it, you can find it in Settings > Installation.
You can also send the code directly to your developer by clicking Send code to developer and entering their email address.
I almost wish we had more to say on this (it's so easy) but if you do get stuck, please contact us at firstname.lastname@example.org.