When writing, it is usual for most people to limit their use of full stops by writing very long sentences, and also to rarely use commas to indicate pauses. Compare these two texts:
Hiking in the national park Joseph Greta Guy and Joanna became separated in the thick forest and it took the park rangers Mike and his partner Trevor more than five hours to locate them because each hiker had decided to try to find their own way back to their camp by going in four different directions and soon became completely lost as the longer they walked the farther they ventured away from safety.
Hiking in the national park, Joseph, Greta, Guy and Joanna became separated in the thick forest. It took the park rangers, Mike and his partner, Trevor, more than five hours to locate them. This was because each hiker had decided to try to find their own way back to their camp by going in four different directions. They soon became completely lost as the longer they walked, the farther they ventured away from safety.
The second paragraph is far easier to follow because it is broken down into several shorter sentences.
Text can be made easier to understand and a passage can be even more interesting when shorter sentences are intermittently used. Commas can greatly add to the clarity of a sentence.
