One of the basics for good SEO
Search engine optimization begins with keyword research. This research is important to all aspects of on-line advertising, not just SEO. You may have the most eloquently written copy on the face of the earth but no one will read it if they can't find it. It's important to use the right words in your copy so that when your potential customers search for those words, you show up in the search results. In order to do this, you first need to know what words or combination of words these future customers are using. This may seem obvious but, trust us, it’s not.
The words people use to search can indicate their interests and intent. Are they looking to buy or are they looking for information? Knowing the exact phrases they use and the intent of those phrases can help you decide on blog topics, site page copy, PPC ad copy, calls to action, on page HTML tags like alt tags and meta tags, headings/titles, and more.
In order to help people get what they want and convince them you can satisfy their needs, you first have to know exactly what those needs and desires are. Keywords research is the starting point.