Oh man, 16GB is going to give you some serious elbow-room for browsing, on a laptop.
I have a pair of Lenovo B50 laptops, with AMD Puma+ core quad-core APUs, and SSDs, but they only came with 4GB of RAM. I found that I was often exceeding that, as I left my browsers running for days, and accumulated tabs.
So I eventually bought a 2x4GB kit of DDR3-1600 SO-DIMMs, and put both in one laptop, and took the factory SO-DIMM out and added it to the other one in the other identical laptop.
Now things are SOOOO much better. I can basically open as many tabs as I want (thus far), without running into severe (well, not horrible with SSD) RAM limitations.
I even bumped up my desktop Ryzen CPU rigs to 32GB of RAM. I was even running out of RAM on my desktop. (350+ browser tabs might do that to you with 16GB).
Edit: I think my APUs are single-channel, so I guess that I could have purchased 2x8GB SO-DIMMs, and then put one 8GB SO-DIMM in each laptop, giving each of them 12GB. Something to consider.