a.href = code example

Example 1: html a href

<a href="http://example.com" >Link text</a>

Example 2: a href to other site

<a href="https://examplesite.com" target="_blank" rel="noopener noreferrer">
  Example Link
</a>

Example 3: htlm link

<a href="https://www.google.com/">Visit googel.com!</a>

Example 4: a href tag

Actually href is a html attribute, which is used for passing page url to the a tag.
Example
<a href="url">Click here</a>