Hi,
Could you check your website for keywords in google,bing and yahoo search engine on 2,3,4,5 etc pages.
Your website may be on other pages instead of first page.
Could you add your website in google webmaster,bing webmaster and add google analytic on your website. These settings will helps search engine to know about your website.
PrestaShop Tutorials Videos [How to do Tasks]
https://www.prestashop.com/forums/topic/907438-prestashop-tutorials-videos-how-to-do-tasks/