When you are setting up your retargeting audience, you should add as many targeting layers as possible to narrow it down.

False. While targeting layers are crucial, adding too many to a retargeting audience can make it too small to be effective. Retargeting relies on reaching users who have already shown interest, so the goal is to cast a wide enough net to capture a significant portion of that engaged audience. Over-segmentation can lead to a very limited audience size, which may result in higher costs, fewer impressions, and ultimately, a lower return on investment. It's important to balance specificity with reach to ensure your retargeting efforts are impactful.