What does it mean when your car needs 'blinker fluid'?

(NEXSTAR) — It's a phrase you've maybe heard around on social media — or maybe even had someone tell you: "Your car is low on blinker fluid."
Recently, “AI Overview” Google suggestions, which appear at the top of results whenever you perform a google search, even suggested that drivers remedy their faulty blinkers by “replacing blinker fluid.”
But what does it mean, exactly? Looking for the best beach? These are the top 10 in the US, annual report sa