A plain-language explanation
Lead Magnet is a valuable material or benefit offered to the recipient in exchange for contact details and consent to further communication.
Where it helps in practice
A resource exchanged for contact details should solve a specific small problem rather than collect addresses without follow-up value.
The decision before implementation
Define the audience, promise, consent scope, delivery and logical next step after download.
How to verify the result
Measure resource use, consent quality, replies, progression and opt-outs rather than form count alone.