# How to add a 'affid' as a custom parameter to track and collect? in HandL UTM Grabber

## UTM attribution overview

This guide explains How to add a 'affid' as a custom parameter to track and collect? in HandL UTM Grabber. It helps you capture UTM source, medium, campaign, term, content, click IDs, referrer, and landing page data and keep the marketing context needed for accurate reporting across forms, bookings, signups, and sales.

### *Video Tutorial*
#### *please click right to the video below and open link in new tab*

[![How to add a 'affid' as a custom parameter to track and collect?](http://img.youtube.com/vi/FftBxIj4NXM/0.jpg)](http://www.youtube.com/watch?v=FftBxIj4NXM "How to add a 'affid' as a custom parameter to track and collect?")