Wordpress is the world's most popular website platform of choice with over over 30% of all websites (globally) using it.
There are many reasons for Wordpress's popularity & success, 10 of which are listed below. However one of the key reasons is because of the flexibility enabled by adding plugins (apps) which can enhance any site's functionality to do almost anything.
A ToolBox with Unlimited Tools
So let's use the metaphor of a toolbox & tools, the toolbox being your Wordpress website & your tools being your plugins.
When you install a Wordpress website you are given a basic toolbox with a few tools (plugins) thrown in.
However because most people have different needs & requirements depending upon their industry, topic, subject matter & objectives it would be ill-advised to load up the default Wordpress website with a whole range of plugins which may not be relevant to many users.
Continuing with the metaphor, in the same way that you would go to a...