This is a boring and somewhat obvious step, but AdWords can be a complicated system to use. To get started, follow Google’s step-by-step guide to get your account up and running.
This is the number one lesson you need to learn when running a paid search campaign. Sending PPC traffic to your homepage (which 80% of people sadly still do) is like sending an intern to buy a left-handed screwdriver at a hardware store (think about it) – it’s stupid, makes no sense, is a waste of money and your gullible shopper will never find what they are looking for.
Why is your homepage bad? Because it’s designed for more general communication and naturally discusses more than one thing – which means it will fall short of matching up to your ad.
They say a picture is worth a thousand words, so you should check out this infographic which discusses the concept of why landing pages are better than your homepage for PPC.