Another tip you can use is just reach out to the prior agency and say something like the following: “We realise you were using link networks for our website which has resulted in a Google penalty and loss in business. Can you please remove my website from any link network you have built?”. If the prior agency is decent, they will remove the links from the network.

This means that each organic search visit is worth $7.35. Chances are, you’ll spend WAY less than that to generate that one visit. How’s that for some rock-solid ROI? You can get even more specific with this by looking at the organic search traffic for a particular keyword. By extension, you can calculate the ROI of that keyword. You can begin to see how this can ramp up your SEO game.
Search engines: Google vs. Bing. Google was the first search engine that provided better search results and people told others about it so it spread virally and became a verb “Google it”, whereas Bing is trying to buy it’s way into the market, doing ads, deals with Facebook and Yahoo, etc. Most people weren’t asking for a 2nd, “me-too” search engine, the first one solved their search pain and continues to do so, so trust was built and people have remained loyal to it.

If you check out some of the suggestions below this though, you're likely to find some opportunities. You can also plug in a few variations of the question to find some search volume; for example, I could search for "cup of java" instead of "what is the meaning of a cup of java" and I'll get a number of keyword opportunities that I can align to the question.
For example, we have seen retailers who produce seasonal items, such as ornaments, based upon data that they are able to find through the Data Cube. This information tells them about the themes and ideas that are popular throughout the year and during their peak selling seasons, helping them to know which items will be the most successful and the optimal names to select.
To give you an idea of just how much money is being spent on paid search, take a look at Google. Google's AdWords program is the most used pay-per-click (PPC) advertising program available today. While the tech giant owns YouTube and Android, among hundreds of other profitable brands, AdWords accounts for roughly 70% of their revenue -- which speaks wonders for its effectiveness.
BrightEdge research supports that a blended approach is best for delivering high performing content. Not only will combining organic and paid search increase website traffic, but it will offer a bigger return on the investment. Take Retail, Technology and Hospitality industries, for example — organic and paid search combined make up more than two-thirds of their total revenue.