To add your widget to your website you will need the code that is generated in the Conversagent portal. You will find this code on the 'Add to Website' screen.
Adding Widget to entire site
Log in to your WordPress site and find the settings to 'Insert headers and footers' or similar.
Copy the code for the header from the Conversagent portal and insert it inside the HEAD tag of your webpage.
Copy the code for the footer from the Conversagent portal and insert it at the bottom of the BODY tag of your webpage.
Adding Widget to an individual page of a site
Log in to your WordPress site and go to the settings for the particular page. You are looking to add code to a field 'Add to head'. Whether this field is available will depend on your theme. A plugin may be required to add head code to individual pages.
Copy the code for the header from the Conversagent portal and insert it in this field.
The code for the body tag can be added to the 'Raw JS' field.