I have done some of test about MBTI and Enneagram

In the MBTI tests, most of times I get INFP, and some times I get INTP.
On Enneagram I always get 8w7.
Can this information can really help someone learn about himself or is just something like the Zodiacs - in which a lot of people believe in them, but also a lot of people just read them for fun - but covered with an intellectual cape?