What it means
Lead list building is the work of turning an ICP into a list of real people you can contact. That means the companies that fit, the right roles inside each one, and a verified way to reach every person. A good list is filtered on fit, deduplicated, enriched and verified before anyone writes a word.
List quality sets the ceiling for everything downstream. Strong copy sent to the wrong people still fails, and a tight list makes even simple copy relevant.
How we use it
When a campaign underperforms, the first question we ask is whether it is the list, and our List Diagnostic answers it. For new lists, the Lead Sourcing Waterfall turns an ICP into a normalised, deduplicated list.
The List Build Run then adds a qualification loop, verification and a scorecard before anything sends. Lists loosen over time as filters are relaxed to hit a volume target, and the signals behind them age. The List Diagnostic measures both.