A template is a cookie-cutter that specifies how to cut cookies that all look pretty much the same (although the cookies can be made of various kinds of dough, they'll all have the same basic shape). In the same way, a class template is a cookie cutter to description of how to build classes that all look basically the same, and a function template describes how to build similar looking functions.
The questions about templates are in the 'Containers' section since templates are often used to build type safe containers (although this only scratches the surface for how they can be used). We will see how to use templates to build container classes below.