There isn't exactly a shortage in the number of companies out there who are active within the field of web solutions, or digital marketing. There are thousands of businesses involved in the industry, and standing out within a field that's so heavily populated can't be easy. Having a great logo is an absolute must if you're even going to stand a fighting chance of survival - so it's a good thing for Green Labs that they struck gold.
The word 'green' implies a company that's ethical and environmentally friendly, and that's summed up perfectly by the tree-based design they've opted for. This isn't just a tree though - look at the branches and leaves, and you'll see that it's actually a human brain, perched on top of the tree. The logo is telling you that this is a company with brains, ethics, and great design ideas - which is precisely what you'd want if you were looking for someone to help you out with marketing.