Boards on Pinterest are just like a virtual pin board where you pin (similar to social bookmarking) your favorite contents like photos and videos extracted from different websites. You can create many boards on Pinterest to keep similar contents at one place. I guess , you have already created a board and want to delete anyone from there.
When you delete a board, all pins ( or content) kept inside will be deleted. So, if you don’t want to loose the pins inside a board then before deleting it, move those pins to another board or create a separate board for them.
To delete a board, login to the Pinboard and from drop-down menu select ” Board “. Choose the board which you want to delete and click on “Edit” button given at the bottom of each board.
Next in the new page, click on “Delete Board” followed by conformation to remove it. You won’t be able to see this board and your all pins inside will be be removed.