RAM upgrade recommendations?

Hey everyone! So, I'm looking to grab one of these three RAM sticks for my laptop, and I was hoping someone could walk me through the actual differences here because I'm feeling a little lost—one is listed as DDR3, one is DDR3L, and then there's this "Brand Memory" one
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"Brand memory" isn't actually a thing—it’s not a technical standard or even a recognized industry term. What matters is the voltage. RAM modules with an "L" designation run at a lower voltage; your best bet is to find a stick that matches the specific technical specs of your current setup. I'm not necessarily saying you need the exact same brand, just something with nearly identical electrical characteristics. If you have "L" RAM, stick with "L." If not, don't try to force it.