Check detailed videoguide about ZOPIM module installation in PrestaShop. This module works also in PrestaShop Cloud service. Addon is totally free and it is available to download from here: Zopim for PrestaShop. Videoguide shows how to install module in PrestaShop 1.6.1 but you can install it in the same way in earlier versions of PrestaShop. Zopim is a support chat feature - you can chat with your customers in realtime (and see who browsing your website). Zopim widget is also responsive - it means that it will work also on mobile devices! Videoguide below: