Ad templates allow you to define the basic look of your listing once and use it across multiple/all of your listings! Also, when you need to make changes to many listings, you can make the change once to your ad template and all the listings that use that ad template will automatically get updated. You can also embed custom fields in the ad template, if you’d like. In Wonder Lister, you can create as many ad templates as you wish, so, you can have an ad template for all your Electronic items, another template for your Clothing & Accessories items, etc.
Screen shot showing AD Template Tags Editor
Screen shot showing AD Template Editor