Keywords in SEO play a pivotal role in boosting your online presence. However, let's delve deeper and understand, what exactly is a keyword in more info SEO.

In online advertising, a keyword is a word or phrase that users enter into search engines when they are trying to find a particular service, product or information. SEO heavily is based on the use of these keywords for website ranking.

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

Having established the explanation of an SEO keyword, let's look at the efficient use of keywords. Improving the use of keywords requires a balance. You'd want to include relevant keywords to appeal to search algorithms but not overly saturate your content with them.

One way is to place the keyword in your content’s headline. This not only helps in ranking, but also makes your content more likely to be relevant to the searcher's query. Next, consider using keywords in the meta description and headings of your website, as these are places where search engines often look.

Additionally, it's important to choose keywords that resonate with your target audience. This signifies understanding their lingo, their internet search habits and their demands.

In conclusion, a well-chosen SEO keyword can be a connection between what a person is looking for and the service or information you provide. It's a crucial tool to succeed in the competitive world of digital marketing. However, as with all tools, using it correctly is the key to unlocking its full potential.