What is an entry process in cPanel sidebar?
The "Entry Process" number is how many PHP scripts you have running at a single time. Silver plan has a limit of 50 EP at a single time and Gold plan has a 100 EP limit.
Keep in mind an "Entry Process" only takes roughly a second to complete, therefore most people get it confused with how many visitors they can have on their website. A 50 limit Entry Process doesn't mean only 50 people can be on your website at once because the likelihood of all 50 people hitting your website at the exact same second is almost zero.
If you have a low traffic website but are constantly at 50 Entry Processes, it means something is wrong with your scripts and they are hanging around longer than they should.