Many new bloggers share their pins on sharing threads on FB which run specific days where they allow new pins to be shared.
This is a good way to quickly get some saves, but reciprocal threads where you have to save 150 pins so 150 people save yours can be very time-consuming and can be considered a bit to spammy as they are click-outs from Facebook Groups.
A better strategy instead of using FB threads, would be to invest in Tailwind Tribes. It is a much more productive way of multiplying your reach, but needs you to spend some money.
Then again, you need to decide which way of promoting your website is best for you, based on your individual time and budget.