wp-content folder contains WordPress themes and plugins, or we just call them extensions, which makes your WordPress different from others.
More or less, we all need to install some to enhance our WordPress system, just like we install softwares on our OS, but it also bring risks. Do not install any unknown extension unless you know exactly what it’s doing.We all heard about viruses and trojans, right? Although WP extensions are open source, people might not take the time to read the code line by line. On the other hand, writing secure code is a skill not every developer learns that well, so it’s possible that a useful plugin becomes a backdoor for hackers. So, be careful when you install something new.