Whether your older laptop is feeling sluggish or your newer system starts chocking up when you have too many tabs open, adding more RAM could solve the problem. If your computer doesn’t have enough physical memory, it starts swapping data to your hard drive or SSD, which is infinitely slower than even the slowest RAM chip. While not all modern laptops give you access to the RAM, many do provide a way to upgrade your memory.

If you can upgrade your laptop’s memory, it won’t cost you much money or time. Moving from 4 to 8GB (the most common upgrade) usually costs between $25 and $55, depending on whether you need to buy the whole amount or just add 4GB. And the process of swapping out RAM chips should take between 5 and 10 minutes, depending on how many screws you have to remove. Here’s how to upgrade your laptop’s memory.
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https://www.laptopmag.com/articles/ram-upgrade-tutorial