Including the rating summary on each page of your website will help those pages rank higher and encourage search engines to include your rating info on their search results pages (so your links get more clicks).
Link the rating summary to a new /reviews page on your website (see Review Detail below) so the 60-80% of people who visit your website to check you out are never more than a click or tap away from reading your customer reviews.
DO include rich snippets when generating your rating summary.
Link to it from the rating summary in your page header (see above).
IF you already have included the rating summary on every page, DO NOT include rich snippets when generating your reviews detail.
Why? Because Google will get confused if you have two sets of rich snippets on the same page.