Check out example codes for "how to show little description on hover html". It will help you in understanding the concepts better.

Code Example 1

<!-- Use Title For Anything You Want Mouseover Text On -->
<a title="Mouseover Text">This Will Have Mouseover Text</a>
<button title="Mouseover Text">This Will Have Mouseover Text</button>
<p title="Mouseover Text">This Will Have Mouseover Text</p>
<div title="Mouseover Text">This Will Have Mouseover Text</div>
...

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