To get new reviews with Fera you need to do one (preferably both) of the following:
Automatically request reviews
Request reviews from past customers
To automatically request reviews from new customers you need to set up an automatic content request campaign.
You can send a one-time review request message to past customers that fit your criteria by creating a one-time review request campaign.
To show the 'write review' link on your site you'll need to add a product reviews list widget to your product pages.
You can request reviews from anyone using your review request deep link. You can send this URL to anyone over any medium to request a review, photos, and/or videos.