A defined sequence of contact attempts over a period: channel, timing and content for each. It exists so follow-up does not depend on somebody remembering.
A typical outbound cadence runs six to nine touches over three weeks. A follow-up cadence after a proposal is usually shorter and more personal.
Front-load it. Attempts in the first week produce most of the responses, and a cadence that spreads eight touches evenly over a month mostly annoys people slowly.
Mix channels, because the same message on three channels reads as one person trying rather than three attempts being made.
As long as you have useful things to say — usually six to nine touches over about three weeks.
It must. A rule depending on manual removal will fail in a busy week.
Yes, and they are usually shorter, more personal and better performing.
Half an hour with your own data usually saves reading three of these. The guides will still be here afterwards.