Six demo BO, on the other hand I couldn't scroll all the way down to bottom of the side menu to entry the module. This is due to by default the menu isn't going to scroll, in order to't view the links to the bottom. There's a totally free module available https://www.presta-addons-modules.com/en/front-office/prestashop-seo-webmaster-site-verification-for-search-engines.html