A sextile brings opportunity. Unlike trines sextiles require effort on the part of the native to work their beneficial influence. 90 degrees apart. Asquare places obstacles and teaches lessons. This aspect usually indicates an area where the person can develope drive and strenght of character by overcoming difficulties.
Thes are the major aspects above.
There are minor aspects which were introduced early in the 17th century by Johannes Kepler,the renowned astronomer who is called the father of modern astrology,and By Jean-Baptise Morin,a French mathematician and astrologer. The minor aspects are Quincunx,Semisquare,Sesquisquare and Semisextile. They only have minor influences in a chart,but more and more modern astrologers use them I usually don't,I'd prefer to use only the major aspects. Also not all astrologers use the same methods.