SlikFlowSlikFlow
Home / Blog / Guides

Sub-IDs: the cheapest way to find winning placements

GuidesSep 16, 2026•4 min read
Sub-IDs attribution

A sub-ID is a custom label you attach to a click. It travels with the visitor and comes back in the postback, so every conversion can be traced to the exact publisher, placement or creative that sent it.

A simple naming scheme

Pick a scheme once and use it everywhere. Consistency matters more than which labels you choose.

Read the report from the top

Start at publisher level, then drill into placement, then creative. You will often find that most results come from a small share of placements.

Act on what you find

Scale the winning placements, pause the weak ones, and test a new creative on the best placement. Small, specific changes are easy to measure.

Quick noteKeep sub-ID values short and lowercase. Clean labels make clean reports.
SF
SlikFlow TeamNotes on tracking, analytics and performance marketing

Keep reading

Ready when you are

Take the leap to clearer results

Start tracking, analyzing and optimizing with SlikFlow. The first step is a single message.

  • Upgrade, downgrade, or cancel anytime
  • 99.99% Guaranteed Uptime SLA
  • 24/7 Dedicated Network Support