Astrology is mostly used to find out the nature and time of the events that happened or will happen in your life.
Life is full of events which are of two kinds - specific events and ordinary events.
First type, arising from your karma or destiny includes death, marriage, profession, owning a house, child birth, accident, disease, money matters and loss of property and relations. Second kind of events arise from one's nature and habits : quarrels with someone, ways of expenditures, love affair, eating habits, communication...