With this line, Capulet reminds Tybalt that he is master of the house and his own uncle. Therefore, he owes Capulet respect. This line comes after Romeo arrives to Capulet's place. As Tybalt knows Romeo to be a Montague, he does not want to welcome him. However, Capulet knows that Romeo has a reputation as a good man, and does not wish to offend him.
