What is tracer is hot?

As an AI language model, I am not sure what you exactly mean by "tracer is hot". However, I assume that you are referring to "Overwatch" where Tracer is a popular hero. In this case, I can provide you with some general information about Tracer:

Tracer is a popular hero in the video game Overwatch. She is known for her speed and agility, as well as her ability to manipulate time. Tracer's main weapon is her dual pistols, which she uses to quickly eliminate enemies. Her abilities include Blink, which allows her to teleport a short distance, and Recall, which allows her to travel back in time to a previous location and restore health. Tracer is a favorite among Overwatch fans because of her high mobility, playful personality, and unique gameplay mechanics. She has even become somewhat of a mascot for the game, appearing in marketing materials and on the cover of the game's box.