# AutoTag

> A Tracking Tag feature that automatically appends the Click ID to outbound links, forms, and checkout redirects before the user clicks — using each destination's correct parameter name.

AutoTag is a [Tracking Tag](/glossary/tracking-tag) feature that automatically appends the [Click ID](/glossary/click-id) to every outbound link, form submission, and checkout redirect on your site — **before** the visitor clicks — so the identifier travels with them to the destination.

## How AutoTag works

AutoTag uses the right parameter name for each destination: `atclid` by default, or the network-specific parameter when the destination is a recognized affiliate network (`sid` for CJ, `subid` for Impact and many others). For links AutoTag can't auto-detect, place the `--CLICK-ID--` token as any parameter's value and the Tag substitutes the real Click ID at page load. If a link already carries a SubID value, AutoTag merges rather than overwrites. It requires links published as regular HTML anchors (not JavaScript-generated).

AutoTag is one of the Tracking Tag's three automation features, alongside **AutoScan** (crawls the page to find trackable links and forms) and **AutoTrack** (tracks form submissions and outbound clicks).

## AutoTag vs Click ID

- [Click ID](/glossary/click-id) — AutoTag *appends* the Click ID; it is not the identifier.