Communication.

"com·mu·ni·ca·tion

kəˌmyo͞onəˈkāSH(ə)n/

noun

1. 1.

   the imparting or exchanging of information or news.

   "direct communication between the two countries will produce greater understanding"

   synonyms:

   transmission, conveyance, divulgence, disclosure; More
2. 2.

   means of connection between people or places, in particular."

A friendship, A relationship, or a work place.
A little communication goes a long way.
When people aren't on the same page things can get beyond disastrous.

Relaying information shouldn't be a task.
It's a basic necessity because we everyone deserves to know.
When you communicate you can have a much better understanding of things.
You will feel happier because you don't have to take extra steps to get something accomplished.

In a relationship, you communicate because your partners needs are just as important as your own.
You communicate ideas, fun things to do with each other, family, future ect.
And without that you are nothing, nothing matters because you don't know anything about each other.

Mistakes are easily avoidable if you just talk to people.
Write an email, send a text, send a carrier pigeon for all I care. Just talk to people.
It won't kill you, it won't even hurt.