Some rookie WordPress developers solve every problem with a plugin.
Want to remove the WordPress credit in the footer? There’s a plugin for that.
Want to add your own credit? There’s a plugin for that..
Need to update the year in your footer copyright notice? There’s a plugin for that.
Think it would be a good idea to embed the old Asteroids arcade game in your website? There’s a plugin for that.
The problem with this is that, before you know it, you have fifty or sixty plugins all adding code to your website, peppering adverts all over the dashboard, potentially slowing your website down, all requiring regular security update, all representing possible attack vectors for hackers, all capable of introducing errors and inconsistencies across your site.