New Laptop, and you don't have Enough RAM this don't add up. ( such is 16gb as minimum today actual you should have 32GB to 16gb, you might think 16gb is enough, next gen game is 16gb ram so you need more for system and other apps running soon.

Do we need to tell you enter steam setting and reduce resource and clear DL cache and delete web Browser cached data. ( This is limit minor tip actual like pie in pants, it will soon get bigger again. )

You can change some settings, but the Steamwebhelpers arre necessary processes. The client is build in Chromium, so it's basically a giant browser. Like browsers (Chrome, Firefox, etc) every part of the broswer has it's own process, in the case of Steam it's own webhelper.

You don't shut them down, cause it's part of the program you want to run.

And yes, it runs in the background. Just as every program that is related to webservices (chat programs, anti-virus, downloaders, etc).

May I suggest that you read up a bit on the service you try to use?

This is not me push you ram up, this is actual new game tiltle's

Example Oblivion Remaster

SYSTEM REQUIREMENTS
MINIMUM:
Requires a 64-bit processor and operating system
OS: Windows 10 version 21H1 (10.0.19043)
Processor: AMD Ryzen 5 2600X, Intel Core i7-6800K
Memory: 16 GB RAM <----------------------------------------------------------
Graphics: AMD Radeon RX 5700, NVIDIA GeForce 1070 Ti
DirectX: Version 12
Storage: 125 GB available space
Additional Notes: SSD Required

RECOMMENDED:
Requires a 64-bit processor and operating system
OS: Windows 10/11 (with updates)
Processor: AMD Ryzen 5 3600X, Intel Core i5-10600K
Memory: 32 GB RAM <----------------------------------------------------------
Graphics: AMD Radeon RX 6800XT or NVIDIA RTX 2080
DirectX: Version 12
Storage: 125 GB available space
Additional Notes: SSD Required; Performance scales with better hardware