Source: http://www.searchenginepeople.com/blog/product-reviews-seo.html
Many consumers today rely a lot on product reviews to help them make the right decision in buying some merchandise. Since most consumers read various product reviews online, this can also be quite a handy tool you can use to achieve your SEO goals.
Below are some tips that can help you learn how to correctly use product reviews in your SEO:
Make use of the right keywords – Create titles for your product reviews that contain a blend of long-term keywords (to help drive sustained traffic) and the trending keywords that you are using (to draw searchers in). Refer to your keywords only when appropriate throughout the article. And don’t cram too many keywords into the title or an article since this will look spammy and will alienate your readers and Google.
Post detailed product reviews – Be very thorough with your review. Answer every question consumer might have (and maybe some that they may not have thought of yet, if possible). In general, readers will want to know how the product handles, performs or feels. Don’t forget to list all the product specs at the bottom of your review page as well since this will enable all your detail-oriented readers to check sizing details, weight, memory, etc.
Come up with objective and unbiased reviews – Give your readers reviews that are comprehensive but don’t try to slant the product one way or another. Always focus on good content and establish yourself as an expert, a person your audience can trust and return to for more advice down the road. And if they like and trust you, then they’ll keep coming back. The more your readers come back, the more likely they are to buy from you in the future.
Don’t forget to share – Lastly, most product reviews for the latest releases in your particular market or niche (specifically high tech or consumer electronics) are topical. As such, you will be able to ride the wave of search traffic, Facebook, and Twitter activity. Once you publish your product review, share this on Twitter with the appropriate hashtag to take full advantage of the flurry of activity. However, keep in mind that these quick bursts of attention don’t last long. To experience the maximum effect, always stay on top of your social media efforts.