Jenkins easy understanding

1.what is jenkins?

jenkins is a self-contained java based program .
Ready to run out of the box with packages for windows, linux, macos and other unix -like operating systems.
jenkins is a free and open source automation server.
it helps automate the parts of software development related to building ,testing , deploying.
it is a server based system that runs in servlet containers such as apache tomcat.
the reason jenkins software became so popular because of its monitoring.
jenkins will continuously repeat the tasks and shows the error quickly.
To use jenkins we need to create a pipeline.
jenkins continuous integartion pipeline is a powerful instrument that consists of some tools.
set of tools designed to host, monitor, compile.
jenkin pugins come with some limited features.
directly we can install and use them.
integration tools like maven.
we can customize jenkins.
They are installed plugins and select plugins to install.

2.list out top 10 popular jenkin plugins?