Id Selector

In CSS id selector is used to apply a style to a specific HTML element which is having a unique ID.
It is written by using the hash character (#), followed by the id of the element.

Key Points:

Inside the curly braces {}, you can specify various CSS properties and values to style the selected element.
While IDs are powerful for unique styling, they should be used sparingly to avoid unnecessary specificity and maintain a clean structure in your CSS.
Prefer using classes for styling elements that are repeated or have similar styles, reserving IDs for unique elements.

Syntax:

#elementID {
   /* CSS properties and values */
}

In this syntax:

The '#' symbol denotes the id selector.
'elementID' should be substituted with the actual id attribute value of the HTML element you wish to target.
Within the curly braces {}, you can define the CSS properties and values you intend to apply to the chosen element.

Example:

<!DOCTYPE html> 
<html> 

<head> 
	<style>
		#para1 {                   // # used for id Selector
			text-align: center;
			color: red;
		}
	</style> 
</head> 

<body> 
	<p id="para1">Quipoin.com</p>  // here id is the idSelector
</body> 

</html>

Output:

Quipoin.com