What slow follow-up costs.

Yes — it is the most consistent finding in trade-show marketing. Show conversations are perishable: buyers meet dozens of vendors in three days, and recall fades within a week. Industry surveys have found for decades that a large share of exhibitor leads never get followed up at all, and that the odds of a response drop sharply within days of the first contact. The exact numbers vary by study; the direction never does.

It applies a simple decay curve: conversion is strongest in the first 48 hours, falls fastest in the first week, and flattens to a floor of buyers who would have converted anyway. It is an illustration calibrated to industry rules of thumb — not a prediction from your data. The honest takeaway is the shape, not the decimals: whatever your true numbers, the area between "day 1" and "day 10" is money.

Because the leads are not in a usable state when the team gets home. Badge-scanner exports arrive days later in a portal nobody logs into; business cards sit in a jacket pocket; the context ("wants the 40-count SKU, ships to Ohio") lives in someone's memory. Fixing the capture step — structured lead, notes attached, in a sheet, same day — is what makes 48-hour follow-up physically possible.

Reference the actual conversation (product discussed, quantity, timeline), deliver the one thing you promised at the booth (price sheet, sample, catalog), and propose one concrete next step. Send it while your booth is still in their photo roll — the same week, ideally within two days.