Responsive websites provide an optimal viewing experience - easy reading and navigation- with a minimum of resizing, across a wide range of devices; including desktop computers, tablets and mobile phones.
Mobile sites are separate sites that are in addition to your desktop website. They provide a user with what is believed to be the most important information "on the go".
Investing the time in an inbound marketing strategy will promote trust amongst your buyers, establish yourself as a thought leader in your industry and be more effective than a paid adwords campaign.