In Acts 16:14, there are four things stated about a woman, in order to describe her to the reader. First, her name was Lydia. If that was all we knew, we wouldn’t actually know her. Second, she was from the city of Thyatira. Now you know a little more, but not much. Third, she was a seller of 
purple. Now you know what she does, but what do you actually know about her—who she really is, what kind of person she is? Here’s the fourth descriptor: she was “a worshiper of God.” That is not telling us merely “what” she was doing at that riverside–that is telling us “who” she is and the depth of her character.
What do people know about you? How would people describe you? If someone were to tell another person just one thing about you, what would you want it to be? Sure, your name, where you’re from and what you do for a living might be a start, but that’s not who you are! If someone were to tell just one thing about you, could they say, “Oh, he/she is a worshiper of God!”?