The steps for this installation may differ depending on whether you are using a sectioned or a non-sectioned theme.
Follow the below steps for installation:

STEP 1
Copy the entailing shortcode <span class=”egg-product-reviews-rating” data-id=”{{ product.id }}” id=”{{ product.id }}”></span>

STEP 2
Go to Online-store → Themes → Actions(Published theme) → Edit code

STEP 3
(For sectioned theme)
Find the code “product.title” in file “product-template” under “Sections” and paste copied code after “product.title” enclosing div in the file.

(For non-sectioned theme)
Find “product.title” this code in “product.liquid” under “Templates” and paste copied code after “product.title” enclosing <div> in snippet file.

STEP 4
Save.