A sway bar (AKA stabilizer bar) is an important component of your car’s suspension, and a sway bar link is what connects the sway bar to other parts of the suspension. Be sure to have the work done ASAP as driving with bad sway bar links will affect the way your vehicle handles, which can be dangerous. This is not a repair that should be put off.
When people can’t figure out what’s going on with their car—whether it’s with the suspension or some other element that isn’t working—they turn to the Internet, looking for an expert to help diagnose the problem.