Long Tail Keywords
Finding the right keywords gets a bit more challenging when it comes to narrowing down a search for long-tail keywords. These are 3+ word strings or phrases that your customer might use to get a more focused product search. For instance, both "budget cellphone in Dallas for 2013" and "best Verizon budget cellphone 2013" are long tail keywords that derive from the theme keyword "cellphone." Targeting "cellphone" gets millions of searches on Google each month. But when you search the term, you get 59 million websites in a search result. You don't want to compete with that many websites and expect to be #1 among 59 million other sites many of which are also search-optimizing their pages.
Software tools that optimize your keyword research
There are a number of online software tools you can use such as the Google Adwords Keyword Tool which is one of the most popular keyword research tools used by only marketers to generate targeted traffic to their websites. It's a free tool on the side. What it does best is provide a list of top long tail keywords that matches your theme keyword based on its extensive database of search query information only Google has as the largest search engine on the planet. However, this advantage is watered down since you won't be able to leverage on what other search engines have which 3rd party non-Google owned keyword optimizers enjoy. In addition, there can be literally thousands of these keyword suggestions that are often inaccurate and require a lot of filtering. You're pretty much on your own to narrow down and choose the most suitable for your site.