Pinterest's sales page for advertisers moving budget from other platforms, listing its ad placements, its own performance figures and the sign-up incentives it currently offers.
Why I recommend it: Free to read, but be clear on what this is: a sales pitch. Every multiple on it (2x impressions, 1.5x recall) is Pinterest measuring Pinterest, with no independent check. Worth a look only for the current incentive offer, and advertising itself costs money.
Pinterest's own marketer guide to running and adjusting festive-season campaigns in real time: what to watch weekly, when to shift budget, and which formats it recommends for each stage.
Why I recommend it: Free to read. The timing advice works whether or not you pay for ads, but remember the guide exists to get you spending — every figure in it is Pinterest's own.