Expand your targeting
This is one way to increase the people you can reach. For example: If you ship to US and Canada, expand your targeting to include Canada. If you’ve been targeting a specific gender, try targeting everyone instead, since targeting on Pinterest is based more on someone’s behavior (using interests or search keywords).
Add creative and increase relevance
Another way to reach a broader audience is testing new creative images and different content you’re looking to promote. There are lots of different creative styles, product lines, types of text overlays and ad formats you can try.
Increase your bids
This helps you make sure you’re competitive enough to reach all (or as much) of your audience.
Increase your budgets
Increasing your overall budgets helps you reach more of your audience.
Increase CTR with improved targeting and more relevant terms, so you expand the audience for what’s working!
Also, cut low performers. For example, if you have a Promoted Pin of a gold ring and you're targeting “jewelry,” “gold jewelry,” “rings,” ” cute rings,” “accessories” and “gifts”—cutting “rings” and “cute rings” from your keyword list probably won't impact performance. However, cutting out “gifts,” if it's not performing well, may be worth it.
Lastly, if you’re already hitting goals but want to scale up keep an eye on your bids. Consider lowering your bids before refining your targeting. This way you can maintain coverage across a broad audience and hit daily spend caps.