As explained in Getting Started with jQuery, typically you use jQuery selectors to locate elements within the page to work on, then call jQuery methods to manipulate those elements.
jQuery selectors are based on CSS selectors, so if you’re familiar with CSS then you already understand the basic idea of selecting elements in the page.
In this tutorial you’ll look at pretty much all of the selectors supported by jQuery. Many of these are the same as CSS selectors, while some are specific to jQuery. For each selector you’ll see an example showing how to use the selector to find page elements.