What are jQuery Selectors? Explain them?

A Selector identifies an HTML element tag that is used to manipulate with jQuery code. 

Selectors allow page elements to be selected. $ is the symbol used for it.
$ can also be called as jQuery selector. Selectors are the most important part of the jQuery , we can say that heart of jQuery.

• We can select single (using id selectors) or multiple elements using class or element selectors
• Selectors find DOM Elements to manipulate based on CSS Selector syntax
  Selectors can find the elements by ID, class, Element Name and hierarchical positioning .
• Selectors can return sequence of DOM elements , and we can use methods or logic on every matched element.

Selectors syntax can be in either of  following 2 ways :

$(Selector Expression)

or

jQuery(Selector Expression)

jQuery has different types of selectors
1. Class Selectors
2. ID Selectors
3. Element Selectors