What policies did William Penn follow in the Pennsylvania colony?
He followed peaceful policies
Penn was a quaker, and based on his religious beliefs he stood for peace and based and thus promoted peaceful relationships with Pennsylvania Natives.
Although Penn's authority over the colony was officially subject only to that of the king, through his Frame of Government he implemented a democratic system with full freedom of religion, fair trials, elected representatives of the people in power, and a separation of powers — again ideas that would later form the basis of the American constitution.
The freedom of religion in Pennsylvania (complete freedom of religion for everybody who believed in God) brought not only English, Welsh, German and Dutch Quakers to the colony, but also Huguenots (French Protestants), Mennonites, Amish, and Lutherans from Catholic German states.
From 1682 to 1684 Penn was, himself, in the Province of Pennsylvania. After the building plans for Philadelphia ("Brotherly Love") had been completed, and Penn's political ideas had been put into a workable form, Penn explored the interior. He befriended the local Indians (primarily of the Leni Lenape (aka Delaware) tribe) , and ensured that they were paid fairly for their lands. Penn even learned several different Indian dialects in order to communicate in negiotiations without interpreters.
Penn introduced laws saying that if a European did an Indian wrong, there would be a fair trial, with an equal number of people from both groups deciding the matter. His measures in this matter proved successful: even though later colonists did not treat the Indians as fairly as Penn and his first group of colonists had done, colonists and Indians remained at peace in Pennsylvania much longer than in the other English colonies.