Use when retargeting is one audience running one ad and the same people keep seeing it.
Replace each placeholder with your own detail. The more specific you are, the less the model invents.
When retargeting is one audience seeing one ad and frequency is climbing. New creative treats a segmentation problem as a production problem and buys you a few weeks. A ladder separates a cart abandoner from someone who read a single page, so message, offer and frequency cap can differ by how close each group got.
The actions you can genuinely track, audience sizes per window, available offers, and {{SALES_CYCLE}} taken from closed deals rather than the default attribution window. That figure sets every window on the ladder. Get it from a thirty day attribution setting when your real cycle is ninety days and the whole ladder is mistimed.
A table from the tightest window outwards with audience definition, size, message, offer, exclusions, frequency cap and why the rung exists, then the exclusion map, the rungs too small to run alone, and windows that clash with your sales cycle. Read the exclusion map line by line, since overlapping rungs make your audiences bid against each other.
Assuming an event exists because a rung needs it. Anything unsupported lands under requires new tracking, and a rung built on a page view you never fired simply collects nobody. The other cost is running rungs of a few hundred people. Merge them into the next rung rather than paying a learning cost twice.