Using the tag as a call to action

I’m creating a subscription page and there are four packages available for purchase. At the bottom of the package description there’s a button link to Learn More about the package. In general, is it valid to use the <strong/> as a call to action? I’ve seen it used in the context of of a sentence or within a paragraph but never as its own entity.

Example

... 
<section>
  <h1>Page Heading</h1>
  <p></p>
</section>

<section>
  <h2>Package Options</h2>

  <div>
    <div>
      <header>                      
        <h3>Package 1></h3>
        <h4>Package 1: Description</h4>
      </header>
      ...
      <a href=""><strong>Learn More</strong></a>
    </div>
  </div>
</section
...