The Insert tag allows users to note where new text has been inserted into a document. The Insert tag is often used in conjunction with the Delete tag. Where a browser often displays text in the Delete tag as being crossed out, the text within the Insert tag appears underlined. This is demonstrated in the following example.
My favorite ice cream flavor is chocolate strawberry.
<p> My favorite ice cream flavor is <del>chocolate</del> <ins>strawberry</ins>. </p>
I found this tag at w3schools.com
The Button tag allows the user to add a clickable button to their page. That button can serve as an interactive feature for the person viewing the page, and can be written to display a text or image when clicked on. Note the example below:
<p> <h3> Click the button below </h3>
</p>
<button type="button" onclick="alert('Cheers! You follow directions well!')">Click here</button>
I found this tag at simplilearn.com
The Blockquote tag is used to add a block of text that is taken as a direct quote from another site. The quoted text is displayed in an indented section of the page, and in correspondence with copyright laws, a citation to the original source of the text is put within the Blockquote tag. An example of this is provided below.
In 1980, physicist Tim Berners-Lee, a contractor at CERN, proposed and prototyped ENQUIRE, a system for CERN researchers to use and share documents. In 1989, Berners-Lee wrote a memo proposing an Internet-based hypertext system.
<p> <h3>Wikipedia on the origins of HTML:</h3>
</p>
<blockquote cite="https://en.wikipedia.org/wiki/HTML">
In 1980, physicist Tim Berners-Lee, a contractor at CERN, proposed and prototyped ENQUIRE, a system for CERN researchers to use and share documents. In 1989, Berners-Lee wrote a memo proposing an Internet-based hypertext system.
</blockquote>
I found this tag at pwskills.com