After adding a product to Lemon Squeezy, it can easily be added to any WordPress post, page, or custom post-type by using the built-in Lemon Squeezy block. To add a checkout button using the WordPress block editor:

1. Add a new block and search for “Lemon Squeezy”
2. Once the block has been added, select the product you would like to sell from the dropdown
3. Add some button text (e.g. “Buy now”)
4. Toggle “Use checkout overlay” if you would like to use the checkout overlay (opens in a modal instead of redirecting to the checkout)

Note: The regular WordPress button block can also be used as a Lemon Squeezy checkout button via the “Lemon Squeezy” section in the block settings.