In order to use custom tags in JSP,we used to have TLD files,along with a Java class to define the custom tags but post JSP 2.0 specs,the same can be achieved,without the need for any Source code files,making it easy to maintain and it can also be created by someone with basic knowledge of JSP tags without need for java code.
There are multiple ways to add comment in JSP page, as it is java view technology which primarily focuses on view part of web application which includes html majorly and being java technology it can contain java code as well. So one needs to understand how to use proper comments in jsp.
There are 3 types of comments we can use in JSP page:
Java comment (which can used inside scriplets)