SEO keywords play a pivotal role in raising your online visibility. However, let's delve deeper and understand, what exactly is a keyword in SEO.

In online advertising, a keyword is a particular term or expression that users input on search engine sites when they are looking for a certain service, product or information. Search engine optimization (SEO) heavily is centered around the use of these keywords to position websites.

The essence behind SEO keywords lies in their ability to relate what users are searching for to the content that your website offers. Strategically using these keywords will help attract the right audience and increase the likelihood of conversions.

Having established what we mean by the term of an SEO keyword, let's look at how to use keywords efficiently. Optimizing the use of keywords requires a balance. You'll want to include relevant keywords to attract search engines but without overloading your content with them.

One way is to place the keyword in your content’s title. This not only helps in optimization, but also makes your content more relevant website to the searcher's query. You should also think about using keywords in the metadata and headings of your website, as these are places where search engines often look.

Furthermore, it's crucial to choose keywords that correlate with your targeted market. This implies understanding their language, their internet search habits and their requirements.

To sum up, a well-chosen SEO keyword can serve as a link between the user's query and your online content. It's a crucial tool to be successful in the aggressive world of digital marketing. However, the best results can only be achieved by using it effectively and responsibly.