Boards are added via a shortcode. First, find the ID number of the Board you’d like to add. To do this, go to Topics > Boards and click on the Board. In the URL of the Board page, you’ll see a tag_ID parameter:
In the example above, you can see that the tag_ID is 44. So 44 is the ID of the board.
Then, go to the page you’d like to add your shortcode and add it like this:
You can add more than one shortcode to a page.
Check this article for how to configure Boards.