# 8.SDK Web (JavaScript SDK) In order to display content in the shop, the **8.SDK Web** (JavaScript SDK) must be integrated. The variable `apiId` must be filled with the API ID provided by us. ```javascript ``` {% hint style="warning" %} The script should be placed as far up as possible in the DOM, preferably as first in the `` tag to ensure it is executed as early as possible. Since the script is inserted dynamically, it is `async` by default and the loading of the page is not blocked. More about this [here](https://developer.mozilla.org/en-US/docs/Web/API/HTMLScriptElement#dynamically_importing_scripts). It is necessary to execute the script before you do the checkout tracking, otherwise tracking will not work. {% endhint %} {% hint style="info" %} The script is required on all pages where 8SELECT widgets are used.\ For transaction tracking, it must also be included on the page **after checkout** where the tracking can happen. {% endhint %}