Add a customer reviews page manually:
a. Go to your Shopify menu and click > online store > pages.
b. Click on ''Add a page'' at the top right.
c. Add a title like: ''Our customer reviews'', ''Our satisfied customers'', etc.
d. Click the < > button and add the line of code below:
<div id="trustreviews" data-trustreviews-aggregate=""></div>
Paste the line of code and click ''Save'', Add this new page in the menu of your choice (header or footer) from the ''navigation'' menu.