Counting each sale once

The problem

A corporate site and an e-commerce site ran as separate properties. A visitor moving between them could be counted twice, which inflated conversions and hid which site was really driving sales.

What I did

• Worked with the SEO agency, which already managed Google Tag Manager, to develop and deploy the event scripts for the events they asked for, and reviewed the setup.
• Took particular care because the e-commerce site's events sat in the same container.
• Set it up so a visit from the corporate site to e-commerce produced one conversion, with the corporate site's part recorded as a referral.

The result

Conversion numbers stopped being duplicated, and the corporate site's contribution could be reported separately.