Clickfuel, a Boston-based marketing startup, has added an additional $4 million to its coffers from existing investor Baird Venture Partners. The firm previously invested $2.5 million in 2010 and another $2.5 million into the marketing services company in 2009. Clickfuel’s new funding round has room to go up to $5 million, according to an SEC filing.

The search marketing company was started in 2009 by vets of Monster Worldwide, the parent company of Monster.com and Colby West, founder of the “sell your stuff on eBay” utility site AuctionPal. The company’s goal is to bring online marketing tools to small and medium sized businesses.

Adam Symson, Chief Digital Officer at E. W. Scripps Company, is listed as a director at the company; James Pavlik of Baird is also on the board.

The funding comes at a time when most small and medium-sized businesses realize they need to spend money on online marketing, but are overwhelmed at how to approach it. Local ad dollars are basically the last frontier of digital media, which explains why companies from Groupon to Yelp to Foursquare to Patch are fighting to be the service provider of choice for these companies.

But aside from the dashboard wars, plenty of mom and pop operators spend a few thousand dollars a month on a basic Google Adwords campaign. The problem is that Google’s typical advice to them is “buy more.” There’s not a lot of help in the “is this working?” department.

Companies like Pricing Engine have sprung up to simplify search and display marketing efforts for small and medium businesses. Clickfuel’s “Fuel Station” dashboard includes an elaborate set of marketing tools such as site design, SEO optimization, email marketing and social. There’s also a white label option for larger companies.