is 略 like... a bad word or just a shortcut??

so i saw 略 on this forum and i think someone told me it means 'skip' or abbreviation, but then i heard a myth that if you use it in emails it’s super rude? like maybe you are calling the other person lazy? also wait, is it related to 旅館 (ryokan) at all because they sound kinda similar to me lol. anyway is 略 actually safe to use or am i gonna offend everyone idk