An advertiser wants a solution to drive more sign-ups to its weekly newsletter. The goal is to build a weekly newsletter database. Which action should the advertiser leverage when setting up the conversion objective campaign?

The correct action to leverage is "Sign-ups" because this directly aligns with the advertiser's goal of building a weekly newsletter database. The conversion objective should reflect the specific action you want users to take. "Checkout" and "Add to cart" are e-commerce specific actions and are not relevant for newsletter sign-ups. "Page visit" is too broad; while users will visit a page to sign up, the ultimate goal is the sign-up itself, not just the visit. Selecting "Sign-ups" allows Pinterest's algorithm to optimize for users most likely to complete that specific action, leading to more efficient campaign performance and better results for the advertiser's objective.