This... is something I wish I would've asked BEFORE I bought my first laptop. (Bought it about 2 years ago?) It looked great, and at the time, I knew NOTHING about computers. I seriously thought the amount of RAM that was installed determined how fast/powerful a computer was! Most employees will try to sell you ANYTHING. Firstly, it'd be great to know of your budget. You really can't go wrong with an Intel processor, but AMD makes some pretty decent ones. If you can help it, avoid AMD E-series processors, because they are fairly weak. (My laptop has an AMD E-1200 processor. VERY slow. Can't handle that much work.) Processors (also known as CPU) help to determine how many operations can be performed, efficiency, etc.In other words, a stronger processor allows you to handle more work at one time. The AMD A-series should suit your needs just fine. (A6,A8,A10, etc.) I'm suggesting AMD because of the cheapness. Intel processors can get very expensive, but Intel celeron is acceptable if you're on a tight budget and plan on using your laptop for everyday use (and not gaming).
The typical amount of RAM on a laptop is 4 GB, and depending on what you plan to do with the laptop, you might want to get a 500 GB (or more) hard drive. If touch screen is important to you, there are plenty of laptops that utilize touch screen features, but for those, I would REALLY have to suggest windows 8.1 instead of windows 8. If you can help it, buying a laptop online would be much cheaper than buying it in an actual store most of the time. Sorry for rambling, good luck on your laptop purchase!