Buying signal
A buying signal is a specific, verifiable event or behavior, a funding round, a role change, a pricing-page visit, that suggests an account or person is more likely evaluating a purchase right now, not just a generic firmographic trait.
A buying signal is a specific event or behavior that suggests an account or person is closer to evaluating a purchase than they were before: a funding round, a new hire stepping into a role with fresh budget authority, a pricing-page revisit, a demo request. What separates a signal from a generic data point is that it's tied to a change, not just a static fact about the company.
An event isn't a signal until it's qualified
A title change showing up in a LinkedIn feed is an event. It only becomes a buying signal once it's qualified: does the new hire actually have budget authority over something they didn't before, and did they inherit a stack or process they didn't choose? Run the same qualification logic on a funding round. Money in the bank isn't a signal on its own. The signal shows up once a person with a mandate to spend it exists, which usually means waiting for the GTM hire that follows the round, not reacting to the round itself.
Behavioral signals need the same discipline. A demo request and a single blog read both get logged as 'engagement,' but they cost the buyer very differently: one takes a calendar slot and a stated reason, the other can happen from an accidental click. Treating them as equally weighted signals is how a low-effort click outranks a real buying motion in a scoring model.
Fit still gates the signal
A real signal at an account outside the target profile still isn't worth acting on. Fit decides whether an account is in the game at all; the signal only decides how urgently, within that game, it needs attention. Skip the fit check and a strong signal at the wrong account just burns a rep's time faster.
In practice
Most signal-based programs run three checks before a signal reaches a rep: did the person's actual responsibility change (not just their employer), was the trigger event the real thing (a new priced funding round, not a bridge or extension dressed up in a press release), and does the account fit the target profile in the first place. Filtering happens before enrichment spend, not after, since enriching a bad signal just makes the noise more expensive.
What people get wrong
Teams treat every category of trigger, job changes, funding, web visits, as one undifferentiated bucket and score them with the same weight. A job change is a question about one person's mandate. A funding round is a question about company-level capital. Sending the same message to both is how a signal-based program ends up looking like a mail merge with an expensive data feed attached.
