yesss
definitely it's true
social networks like facebook, twitter, google+ are most important factors in seo related cases.
you can use some social network integrations modules like:
- twitter prestashop share
- facebook product share
- google product share
- facebook like coupon
- google+ comments
These modules allow to share your products on social network, if you will have more shares, then these products and whole shop will be more visible in google search results
Nice sharing @vekia . Informative modules. Thanks