Hi,
In the settings of your menu item, under the "products options" tab, if you set the item layout to "title and description", it will display the title and the description. If you don't have that setting, it probably means that you've selected the "list" or "table" layouts instead of the "div" layout at the top of the tab as only the div layout allows for different item layouts to be chosen from.
Alternatively, if you want to modify a view file and you don't know which one is being used, the best is to activate the "display view files" setting of the HikaShop configuration. Then, look at the page where you want to do your change and you'll see each view file being marked so that you can easily identify which view file to edit via the menu Display>Views.