Standard pins perform best at 1000 x 1500px (a 2:3 ratio). Taller pins can get cut off in the feed, and square or landscape pins take up less space and get fewer clicks. Keep your key text in the top third so it’s readable at thumbnail size.
A fresh pin is a brand-new image Pinterest hasn’t seen before — even if it links to an existing URL. Pinterest heavily favours fresh pins over repins, so the winning strategy is to create 2–4 different designs for every link rather than pinning the same image repeatedly.
Around 45 days ahead. Pinterest is a planning platform — people search for holidays, seasons and events weeks in advance. Pinning your Christmas or summer content 6 weeks early gives it time to gain traction before demand peaks.