After following the steps from: Setup Webchat, click on Copy Code.
Log in to your Shopify account.
Click on Online Store > Themes.
Click on the three dots that appear next to the customize button > click Edit Code.
Click on Layout > Theme Liquid.
On the righthand side, scroll all the way down and find </body>, and paste the code you copied right above it.
Click Save in the top right corner.
💪 Dynamic webchat
Any changes you make to your webchat settings update dynamically, so you won’t need to repeat these steps.