Small businesses looking to quickly grow their client base and boost their earnings should invest in advertising to build awareness of their brand among a larger audience. There are a variety of different advertising approaches that your small business can take. You can focus on digital ad platforms, including Facebook, Twitter, LinkedIn, YouTube and Google AdWords. Or, you can choose more traditional advertising mediums, including newspapers, radio and local TV. Investing strategically in advertising for your small business can result in a high return on investment, bringing valuable new business to your company.