These two countries had emerged as the major colonial powers in the US and Canada, and their thirst for land manifested itself in a war over the strategic location of the Ohio River Valley. The French and Indian War was a smaller part of the much larger Seven Years War.
The United Kingdom gained great amounts of land, and lots of costs, taxes!!
The native americans who were previously under control of the French were now under control of the much harsher British, leading to many more conflicts
The French lost most of their territories in North America, losing a considerable amount of wealth and power.
The French and Indian War was expensive, and the British needed to pay for it somehow. They decided the best way to do that was tax their colonies, who had no say so in it whatsoever. Taxation without representation, which led to the revolution and American independence.
North America was sought after by many European powers, including France and England. In the middle of France and Englands colonial lands was the Ohio River Valley, a strategic location criss-crossed with rivers, lakes, and fertile soil. France and England were also already fighting all over the globe, and North America was the newest battleground.
The last couple years of the French and Indian War were almost devoid of french. It was mostly small fights between the British and the Native Americans from their newly gained lands. One chief even tired to orgnaize all the tribes into one alliance to try to drive out the British but was not successful. Spain also gained substantial territory, even though they were on the losing side of the war. They ceded FLorida to the UK but it was not gone for long.