What is the difference between hit ID, VID, and click ID?

FunnelFlux is a node-based visual funnel building system.

When a visitor enters your funnel, they enter at a specific node. They then move through the funnel like a flow chart, touching different nodes as they go.

These identifiers describe different parts of that journey.

• Hit ID identifies a specific tracking event or node touch in FunnelFlux.
• VID means visitor ID. It identifies the visitor session.
• Click ID is an internal identifier for a click event in FunnelFlux, but it is not usually something you need to use directly.

Hit ID

Every node a visitor touches creates a hit ID.

This means a visitor can generate many hit IDs during a single funnel journey: one for the entrance, one for a lander view, one for an offer view, and so on.

When a visitor reaches a page or page group, the hit ID created there is the ID that can later be converted into conversions or custom events. These page-view hit IDs are also what you usually pass to external systems like affiliate networks.

So when an affiliate network asks you to pass a click ID for conversion tracking, in FunnelFlux this usually means passing the FunnelFlux hit ID.

Use the {hit} token for this.

VID / visitor ID

VID means visitor ID. It identifies a specific visitor session.

FunnelFlux uses the VID to keep track of the visitor as they move from a redirect, to a page, to an action link, and onward through the rest of the funnel. This is how we keep a coherent journey without relying only on cookies.

This is why session passing is important. If the VID is lost, FunnelFlux may lose track of where that visitor is in the funnel.

VID session data is stored in Redis on our globally distributed redirect infrastructure and is temporary. Sessions last approximately 24 hours.

FunnelFlux also drops cookies that can recover basic session data if a visitor returns later. This can help resume tracking, but it does not make the original VID session permanent.

VID values can appear in analytics as session identifiers, but the full session data itself is not permanent analytics data. It expires over time.

You generally should not use VID values in postback URLs. They are transient and are not the best identifier for conversion attribution. Use hit IDs for postbacks instead.

VIDs are used by JavaScript conversion tracking because the JavaScript needs to know the current visitor session. But for server-side postbacks, use the hit ID method whenever possible.

Click ID

FunnelFlux also creates a click event when a visitor clicks out from a lander or offer using an action link.

That click event has its own internal click ID, linked back to the hit ID that created it.

Click ID is mainly visible in raw events. It is not something you typically pass around or use in integrations, and FunnelFlux does not expose normal user-facing tokens for it.

This can be confusing because affiliates and networks often use the phrase "click ID" to mean "the unique ID you pass to the network so they can send it back on conversion."

In FunnelFlux, that value is normally the hit ID, not the internal click ID.

For the deeper technical reference, see VID and Hit ID Reference.

Updated on: 20/05/2026