1) Weather Forecasting
Certain satellites are specifically designed to monitor the climatic conditions of earth. They continuously monitor the assigned areas of earth and predict the weather conditions of that region. These satellites are exceptionally useful in predicting disasters like hurricanes, and monitor the changes in the Earth’s veg
2) Radio and TV Broadcast
These dedicated satellites are responsible for making 100s of channels across the globe available for everyone. They are also responsible for etation, sea state, ocean colour and ice states. broadcasting live matches, news, world-wide radio services.
3) Military Satellites
These satellites are often used for gathering intelligence, as a communications satellite used for military purposes, or as a military weapon.
4) Navigation Satellites
These satellites   allow for precise localization world-wide, and with some additional techniques, the precision is in the range of some meters. Ships and aircraft rely on GPS as an addition to traditional navigation systems. 
5) Global Telephone
One of the first applications of satellites for communication was the establishment of international telephone backbones. Instead of using cables it was sometimes faster to launch a new satellite. But, fiber optic cables are still replacing satellite communication across long distance as in a fiber optic cable, light is used instead of radio frequency, hence making the communication much faster.
6) Connecting Remote Areas
Due to their geographical location many places all over the world do not have direct wired connection to the telephone network or the internet (e.g., researchers on Antarctica). Here the satellite   provides a complete coverage and (generally) there is one satellite always present across the horizon.