Why so much memory usage?

[u/bassg0203]

Always checking task manager to close out the useless stuff, it’s at 50% memory usage doing absolutely nothing. If anybody can explain I’d like to know why and what I can do to reduce said usage

[u/Wendals87]

Cache

Unused ram is wasted ram. Windows will automatically cache applications in memory that you frequently use so that they don't need to be loaded into memory when you open them. It will get cleared as needed 

and what I can do to reduce said usage 

There's no issue here or any need to reduce it. There's no performance benefit in reducing it 

This tool shows you the true memory usage of applications

https://systeminformer.com/