This is going to be one thing that can really benefit you and your website's traffic...
Combining Your Product Reviews into lists. What I mean by this is selling keywords like "Best ___________ for __________" or "Top 10 _________ For _________" Once you have some product reviews you will be able to use them however you want on your website.
I have some examples of What I Mean...
I have over 60 Nerf Gun reviews on my site. Nerf Guns themselves are my overall group/niche, but within my niche, I have created posts that help others looking for things that are not directly associated with any certain Nerf Gun, but a group, for example, "Top 9 Automatic Nerf Guns"
You can make posts for anything related to what people are searching, this is the point of keyword research, within my post of automatic Nerf Guns, there is a link to read the full review and a brief description of each Nerf Gun. There is no affiliate links on these pages for purposes of SEO, instead they benefit your review pages, more people read more of your reviews, they are researching, help them research!
With Different Niches, you might need to research deeper into Keywords to find beneficial keywords to turn into a list post/page. This is what I mean by developing your own twist. Every Niche has different terminology, if you can use the right terminology to connect with your audience, you may gain more attention then your competition.
List posts/pages are also great for social media sharing, if you can gain a following on social media, you can gain a lot of traffic with these lists and possibly even create a trend. If you can make others talk about your site, your brand, your business, you are on the right track to success.
Now that you have your reviews created and your listed created to attract visitors, there is going to be more ways to attract visitors with other keyword posts to gain more authority, I will go over this next!