Listings age visibly. Days on the market is public and damaging, so knowing which properties are approaching that point, and which instructions are about to expire, is what triggers the conversation about price before it is too late.
Feedback is evidence. Ten viewings and no offers is an argument about the asking price only if the comments were recorded, and a vendor who hears specifics accepts a reduction that a vague summary would not achieve.
Progression is chasing strangers. Solicitors, surveyors, lenders and three other households determine whether a sale completes, and an agency without a systematic chase discovers a stalled chain when somebody finally telephones to complain.
Silence is what vendors punish. Most complaints are about not hearing anything rather than about results, so a record of when each seller was last spoken to prevents more anger than another portal upgrade ever will.