Here's how you install Mida script on your BigCommerce site:
In your BigCommerce account, click the Storefront > Script Manager on the menu.
Click the Create Script button and fill up the details below:
Name of Script: Mida
Location on page: Head
Select pages where script will be added: All pages
Script category: A/B Testing
Script type: Script
Script contents: Paste your Mida tracking code here.
Click Save to apply the tracking code.
Congratulations, you have installed the Mida tracking code!