What are keywords and why do I need them?

AlienLabs Brisbane Boutique Website Design knows keywords

Keywords in quality content = higher search engine ranking.

In search engine land, the keyword or search phrase a person uses is crucial. Keywords can be a single term, or keyword phases can be used which contain multiple words.
To appear on those first few pages of search engine results, your website must contain a density of keywords or phrases related to the search terms used. It is an imperative part of search engine optimisation for any website.

So how do you get the most out of your keywords?