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

In internet marketing, a keyword is a particular term or expression that users input on search engine sites when they are searching for a specific service, product or information. SEO heavily depends on the use of these keywords to rank websites.

The essence behind SEO keywords lies in their ability to link what users here are searching for to the content that you’re offering on your website. Effectively using these keywords will help attract the right audience and boost the likelihood of turnover.

Having established the explanation of an SEO keyword, let's look at the efficient use of keywords. maximizing the use of keywords requires a balance. You'd want to include relevant keywords to appeal to search algorithms but without overloading your content with them.

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

Moreover, it's critical to choose keywords that resonate with your target audience. This means understanding their lingo, their search behaviors and their needs.

To conclude, a well-chosen SEO keyword can be a connection between the user's search and your website's offerings. It's a crucial tool to succeed in the aggressive world of digital marketing. However, its full potential can only be unlocked when used correctly.