Question

Okay so yesterday I saw one post on lossless audio and where i could get Them. Thank you for that I do have a new variety of audio other than mp3 I think it's flac. Regarding my question What's the difference between mp3 160k And flac? Why is it called lossless audio ? What is lossless audio ? Can anyone differentiate between two different format? That's all thank you and have a great day 😊