Position Absolute
position: absolute Property:¶
When setting a tag to position: absolute;, we are setting that tag to an absolute position within its nearest ancester that is also set to position: absolute;.
If no ancesters are set to position: absolute, then it is absolute within the entire page.
When setting a tag to position: absolute;, we also set top, bottom, left, and / or right.
When setting a tag to position: absolute;, other elements are positioned as if the absolute element is NOT present.
<html>
<head>
<title> Absolute Position </title>
<link rel="stylesheet" type="text/css" href="myStyles.css" />
</head>
<body>
<span class="topRight"> Top Right </span>
<span class="bottomLeft"> Bottom Left </span>
<span> No Absolute Positioning 1 </span>
<p> No Absolute Positioning 2 </p>
<div> No Absolute Positioning 3 </div>
</body>
</html>

.bottomLeft {
position: absolute;
bottom: 0;
left: 100px;
}
.topRight {
position: absolute;
top: 0;
right: 0;
}

For a more thorough discussion, watch https://www.youtube.com/watch?v=wmAP2xvNs08