<c:forEach items="" var="">

This is a JSTL (JavaServer Pages Standard Tag Library) tag used in JSP (JavaServer Pages) to iterate over a collection of objects.

The "items" attribute specifies the collection of objects to be iterated over, and the "var" attribute specifies the variable name used to store each object in the collection during each iteration.

For example, if we have a list of names in a variable called "namesList", we can use the forEach tag to iterate over each name in the list and print it out:

<c:forEach items="${namesList}" var="name">
${name}
</c:forEach>

In the above example, ${namesList} is an expression that evaluates to the list of names we want to iterate over, and "name" is the variable name we're using to store each name during each iteration. The ${name} expression is used to print out the current name during each iteration.