Final answer:
The common convention for naming jQuery selectors is using a variable name starting with a dollar sign followed by a descriptive name, such as $header for an element with the id 'header'.
Step-by-step explanation:
The common convention for naming jQuery selectors is to use a variable name that begins with the dollar sign ($) followed by a name that describes the element being selected. This is not a requirement but rather a convention that many developers follow to easily differentiate jQuery objects from other variables. For example, if you are selecting an element with an id of 'header', you would write var $header = $('#header');. It's important to keep the names descriptive to maintain readable and maintainable code. The use of the dollar sign is a nod to jQuery's alias, which is also the dollar sign.
Employing descriptive names enhances code readability and maintainability. The adoption of the dollar sign in the variable name is a nod to jQuery's alias, where the dollar sign itself is a shorthand reference to the jQuery library. This convention not only aligns with jQuery's identity but also signals that the variable is likely holding a jQuery object.