I’ve seen so many English mistakes which are mostly grammar mistakes.

However, I’ve realized that the majority of people use “their, there and they’re” wrong which kinda annoys me I dunno why 😅😅

Well here’s the difference ⬇️ 

Their is the possessive pronoun, as in "their car is red"; there is used as an adjective, "he is always there for me," a noun, "get away from there," and, chiefly, an adverb, "stop right there"; they're is a contraction of "they are," as in "they're getting married."