Hi,
Could you cross check all your webpages with 160 characters meta description and no unwanted data.
If your website is updated then google bot revisit website and re-scan all pages and automatically pages will be updated on search engine.
Google bot visit and scan website on regular interval to update database.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/