Signal-based ABM triggers activity from observed events rather than a fixed campaign calendar. A hiring pattern, a funding round, a competitor renewal date or a spike in research behaviour starts a sequence, so effort lands when an account is actually moving rather than when the quarter began.
Ones that imply a decision is near and that you can act on before anyone else. A funding round is public and everybody sees it, so the advantage lasts days. A competitor contract approaching renewal is specific and timed, which is far more useful and much harder to source.
Aggregate intent without a named person. Knowing an account researched your category tells you nothing about who, or whether they have budget, and a rep sent after it burns a touch on a guess. Treat third-party intent data as a prioritisation input, not a trigger for outreach.
Something ready to send when the signal fires. A trigger with a two-week content lead time is not a trigger, it is a notification. This is why signal-based programmes tend to work only where campaign assets can be produced quickly.