Every store owner would like to highlight their products among search results in order to get more organic traffic. Rich snippets is easiest and most efficient way to do that. Snippets is few lines of text that appear under every search result that give users additional information about your store products offer. According to SEOMOZ you can get up to 30% click through rate increase with Google Rich Snippets installed.
Rich snippets will help you:
- Drawing a user's attention to your relevant result.
- Increasing click-through rates Providing instant information on your product on SERPs.
- Display reviews on SERPs
- Display stock status on SERPs
- Display price on SERPs
Please find more information on the Magento rich snippets extension page.