The average organic Facebook Page post sees just 0.07% engagement (font: Hootsuite). To better this result you need to know more about how Facebook’s algorithm works. You want it to know that your content is valuable, authentic, and serving your followers.
Pinterest is more than a social media: it is both a search engine for images and an “intent search” place. What I mean is that Pinterest is a place where you go because you have the intention to search for something, to learn more about something.