On a Wordpress website a campaign tracker for the form is needed.
It uses Nexforms WP Plugin with 6 forms.
In the sent form the source of traffic should be shown:
Organic search
Adwords
Direct
referrer
Google Analytics is installed and working.
Similar features as this plugin:
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Hello
I can customize your form to show source of traffic and when form is sent that data will also arrive in your email.
Please show me your website so that I can code it right away, it won't take much time I think.