Installing a widget on the site, how to explain to customers?

Question

Marketing

Hello!
I have a service (provides statistics on clicks by ad competitors in Yandex.Direct).
Sales funnel:
1) email distribution
2) opening a letter
3) transition to a landing page
4) registration
5) adding the site url to the
personal account 6) installing a code before the tag (which tracks clicks)
At the sixth step - silence!
People add the site and further stupor.
It was decided to make a gasket, with its help you can send a letter to the company's programmer with instructions for installing the code - effect 0.
How do b2b services usually offer code installation to their customers?
What solution is effective?

Answer 1

Judging by the functionality, the main client is a small business. Most likely there is no programmer at all.
Options:
1. Write accessible instructions for implementing code, for example, through GTM
2. Make plugins for popular cms clients

Answer 2

Offer to bet with your forces, try a few times, you will understand what the pain is