WordStream announced today that they’ve secured $6 million in third round funding. Leading the charge are existing investors Sigma Partners and Egan-Managed Capital. Wordstream has raised a total of $16 million to date.

The Boston-based search engine marketing company provides software and services mainly to SMBs. For their roughly 1,000 clients, WordStream offers keyword management tools and suggestions, inexpensive advertising opportunities, and search ranking and Quality Score in AdWords.

In the press release, CEO Ralph Folz stated, “WordStream’s growth has picked up dramatically in 2012 and we are fortunate to have investors ready and willing to fuel this growth.”

The funding will be used to help further the development of the company’s pay-per-click management software, aptly named PPC Advisor, and to help their bolstering expansion.

WordStream has also been making waves at MITX, snagging the 2012 award for Best Customer Engagement Driver and also the 2009 PricewaterhouseCooper’s Promise Award. They were also named one of Boston.com’s top “up and coming” private companies centralized in the Boston area.