Here it goes,
1. JSTL (
JSP Standard Tag Library) is a collection of custom tags l
libraries.
2. It provides common functionality that many web applications need.
3. JSTL provides support for presentation logic, formatting, XML support,
and database access.
4. JSTL extends many of the concepts found in
Struts logic tags.
(In many ways, JSTL is the natural successor to the Struts tag
libraries.)
5. JSTL tags take the place of many Struts tags.
Note: It is recommended that you use JSTL tags in place of Struts tags
when there is an overlap.
Do more research on JSTL. And for SCWCD exam it helps a lot too!!