The printing press helped promote European exploration in the fifteenth century. The printing press allowed for information to be communicated faster and to reach more people. As a result of the printing press, people learned about the explorations that took place. They were aware of the benefits of exploring as well as of the risks that existed.
When other countries and explorers realized there could be economic benefits for themselves and their country as a result of reading about the explorations, this helped to lead to more explorations. It also allowed these countries to claim more land to add to their empire. When Columbus went exploring for the Spanish King and Queen, he claimed lands that became part of the Spanish Empire. Using the printing press also allowed for the sharing some of the difficulties the explorers faced. This could help future explorers and explorations.
The printing press allowed for information about the explorations to be communicated faster and to reach more people. This encouraged more explorations to occur.
The printing press was not as important as inventions like the caravel (which allowed explorers to have a better chance at sailing in tough conditions) or the compass (which allowed them to know which direction they were going). However, it was important in that it allowed knowledge to spread very easily around Europe.
Once Columbus had "discovered" the New World, (or once explorers had sailed around Africa) news of his discovery and discussions of it could travel very quickly. This was because such reports could simply be printed rather than being copied by hand. As more people became aware of the discovery, more people wanted to get out and go searching for places where they could make money and (for countries) gain power.
In this way, the printing press helped promote exploration.