As an SEO expert, a large part of our job is to research keywords for our clients (and ourselves), then place those keywords within a web page so a search engine will index and hopefully get a site to the top for that keyword. One of the most important things to realize about this process is that humans seldom search Google the way we think they will.
It's not all their fault; there are many reasons for this, not the least being the bad track record search engines have of giving actual relevant results for our searches. Until that is, 2012 when Google did their Penguin and Panda updates to filter out many 'bad' results and give us what we're really looking for. Unfortunately, people are slow learners and continue to search for weird phrases to find what they want.
Case in point - the title of this page is "Website Design Website", which gets over 5 million searches a month! Other keywords in this genre are "web design website", "design website design" and even "web design website design", all getting more than 4 million searches a month. Just when you think you know what people are searching for Google tells us different, in any business genre.
That's why no matter how much you think you know about your customer base, your industry and even SEO, you have to use the Google Keyword Research Tool to find out what your top keywords are; the result may surprise you.