Advertising online is a great way to drive new customers to your business. There are two primary types of online advertising CPM and CPC. CPM advertising is when you buy a certain number of advertisement impressions and is typically associated with banner ads. While CPC (Cost Per Click) advertising allows you to pay only when someone clicks on your ad. Both methods of advertising can be effective. However if you're just starting out I recommend CPC advertising because you're only paying for visitors who come to your website. This will allow you to closely control your advertising budget.
The best place to get started with a CPC campaign is with Google Adwords. Google Adwords allows you to bid for position on a CPC basis amongst Google's search results. Of all the advertising I've tried I find Google Adwords delivers the most return on investment. In fact studies show Adwords is the second best form of advertising next to email. With Adwords you'll not only be able to buy sponsored results on their search engine but also display (banner) ads on their large network of partner sites. Be careful when running any display advertising campaign. A lot of the time you'll find yourself competing with big businesses who are willing to throw a lot of money away to build brand recognition.
Of course if you're advertising online the most important thing is that you have a website. You can get a free website at WebStarts.com and when you upgrade to a WebStarts Pro Plus account you'll also get $150 coupon toward CPC ads on both Google Adwords and Facebook.