How fast your smartphone will run depends on both the amount and type of RAM. Nowadays you can mostly find RAM chips like LPDDR4x (standard for most smartphones) and LPDDR5 (a more recent format found mostly in flagships).
Today, the minimum amount of RAM that will allow you to comfortably use a smartphone is 4 GB. Such devices can manage social networks and instant messengers. However, if you open more than one tab in the browser or start using two applications at the same time, the phone will start to slow down.
The optimal amount of RAM for most of us today would be 6 GB. Such smartphones will work perfectly with multiple applications at the same time.
If you like to play games or use heavy applications such as photo and video editors, the best option is to buy a smartphone with 8 GB RAM.
If you’re editing 4K videos, playing very demanding games, or using your smartphone as a workstation, you’ll need 12GB of RAM. In most cases this amount of RAM is excessive.
It is not always wise to buy a smartphone with a large amount of RAM. This is because a device with 12 GB RAM consumes more energy, which means it needs to be charged more frequently. It also happens that manufacturers save on some more important components by installing 12 or 16 GB of RAM. For example, on the processor or on the battery. As a result, your smartphone may run slower or drain its battery faster.
Source: Ferra

I am a professional journalist and content creator with extensive experience writing for news websites. I currently work as an author at Gadget Onus, where I specialize in covering hot news topics. My written pieces have been published on some of the biggest media outlets around the world, including The Guardian and BBC News.