You can rate and review any product which you have purchased by

1. Visiting the product page where you can find ‘Reviews’ section after scrolling few lines down. Here you can give your ratings out of 5 stars for that particular product and also write a review about it and submit the form.
   
2. You can visit your ‘Orders’ section in the ‘My Account’ menu where you can find your purchased products history. You will also find a review link next to every product that you have purchased. Click on the that link to open a form to rate and review that particular product and submit it.