SEO keywords play a pivotal role in promoting your online presence. So what exactly is an keyword in SEO? Let's break it down.

In digital marketing, a keyword is a word or phrase that users input on search engine sites when they are searching for a certain service, product or information. Search engine optimization (SEO) heavily relies on the use website of these keywords in ranking websites.

The power behind SEO keywords lies in their ability to link what users are searching for to the content that your website is providing. Cleverly using these keywords will help pull in the right audience and boost the likelihood of leads.

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

One way is placing the keyword in your content’s headline. This not only helps in optimization, but also makes your content more relevant to the searcher's query. Also, consider using keywords in the metadata and headings of your website, as these are places where search engines tend to look.

It's also essential to choose keywords that align with your audience. This signifies understanding the way they talk, their internet search habits and their demands.

In conclusion, a well-chosen SEO keyword can act as a bridge between a prospective client's search and your website. It's a crucial tool in achieving success in the aggressive world of digital marketing. However, success hinges on its effective and balanced use.