You will receive the synastry between you and your partner's natal charts. It can tell where your strengths and weakness are. It can tell how your communication styles are compatible or where it may cause friction. It can help point where you find passion in your day to day. It tells us about how each zodiac and the house as well as the planets affect us compared to our partner. This will be typed out and sent for you to refer to and compare the two.
Perspective, not certainty. A reading offers guidance for your path — the choices stay yours.