The principle behind LeadLabs is that you have a data collection website.
You send web traffic to it.
It extracts personal data from web visitors, which you turn into leads for specific products.
Suppliers and Supplier Campaigns are how you track visitors to your website. Generally speaking a Supplier is where someone comes from (e.g. Facebook); whereas a Supplier Campaign is why they have come (i.e. the marketing pitch).
You track the Supplier and Supplier Campaign associated with a specific web visitor by using different links.
Here is an example fuly-parameterised link:
You will notice that the domain of this link (i.e. test.app.leadlabs.com) is pretty generic. So, how does LeadLabs know which webpage to display? How does LeadLabs know the correct Supplier and Supplier Campaign to credit each visitor to?
The answer is the parameter at the end:
This parameter tells LeadLabs which Supplier Campaign this person is coming from. The Supplier Campaign is associated with one Supplier, one Website, and one Landing Page.