Yours is the second person possessive pronoun. Yours can refer to one or more people
People write yours, yours sincerely, or yours faithfully at the end of a letter before they sign their name. With best regards, Yours, George Yours faithfully, Michael Moore, London Business School yours truly: see truly
A speaker or writer uses yours to refer to something that belongs or relates to the person or people that they are talking or writing to. I'll take my coat upstairs. Shall I take yours, Roberta? I believe Paul was a friend of yours If yours is a high-stress job, it is important that you learn how to cope