Twitter has a very good online ad tool that allows you to define an ad, establish the groups you would like to target, and understand the costs.

If your budget will allow, and your topic is of general interest to a large audience, you can try this too

are something that small and medium-sized businesses can use.

If you are in the food, retail, or movie distribution business, Product Pins are worth a try if you have a popular product at an attractive price, or if you want to use a specific product as a loss-leader to motivate people to come to your website (where you can expose them to your entire catalog of products).

and start pinning photos of your products, The idea here is to control the content of your brand page, and develop other boards where followers can pin pictures.

a Pin It button to your website and Facebook page to encourage fans and followers to pin your photos to their own boards, and to recommend them to friends.

boards that emphasize life styles or fashions. Pinterest is not just, or even primarily, a selling site. It is also an entertainment and branding site.

Make sure your pins have a URL link to your store, or to vendor stores, so followers can easily buy as well as “see.” Be sure to use keywords .

with Facebook and Twitter. Create Facebook and Twitter logins so that users can go to your pins and boards without leaving the Facebook and Twitter sites.

join the conversation. Follow other pinners

and boards and ask to receive e-mail and Facebook updates.

Identify location of user’s device and target

ads, recommending actions within reach

Identify a perimeter around a location and target ads and recommendations within that perimeter