Your ascendant/rising sign is the zodiac sign and degree that was rising on the eastern horizon at the specific time, date and place of your birth. The rising sign starts off the first house (pie slice) of your natal chart, which is the house of your personality, your identity and your physical body and life path in this physical, material existence. The ascendant sign can be found at the leftmost point of the chart.
The rising sign is how other people receive you and how you come across. This is different from the sun sign because the sun sign determines what you believe you're putting out there. We all have sides to us that we are blind to because we all have unconscious mannerisms and things that we do naturally without thinking - the rising sign