1. Login to your Google My Business account, go to the section "Info" and change the primary category of your business from to just "Restaurant". Thereafter, you will be able to add more category by clicking on "add a category".
2. Once in the "Restaurant" category, you will see the field "reservation URL" appear.
** If you are not in the "Restaurant" primary category, the online booking field will simply not be visible in the "Info" section.
3. How to find your booking URL for Facebook?
From your Libro back-end, simply go to the restaurant settings, under the Widgets tab. You will find the URL under your Libro widget in the iframe code.
IMPORTANT: Copy / Paste only from https:// to book and replace the word WEB with GOOGLE (in upper case).
Your Google URL should look like this: