Explanation please...

Ascendents? what is that all about?

http://www.alwaysastrology.com/rising-signs.html

I'd say the most important placement to know in your chart as it determines the positions of your houses, your chart ruler, plus, without it you can't know the degree, sometimes even the sign of your Moon with certainty.

Its your social mask, who you are in a party, Libra, social creature, Scorpio, dark, clever manipulator, Sag party animal etc...