When you report something, you tell what happened. After giving the details of your groundbreaking news story, you might end by saying, “...reporting live from Washington, D.C.”
In addition to the action of telling, what gets told is also called a report. Your report on annual snowfall in New Mexico was brief but informative. Report also applies to calling the police or other authorities. You might not like the way your neighbor trims his poodle, but that doesn't mean you should report him for animal abuse.