Student or Learner
Could you help me understand the difference between:
- each other
The usage of these words
together, an adverb, means, in association with, and it answers the question How?
Sentence: We did it together.
Question: How did we do it?
Answer: Together. (adverb)
each other is a reciprocal pronoun. For example, if you gave me a pencil and I gave you a pencil, we can say that,
 We gave each other pencils
 We gave pencils to each other.
If more than two people are involved (let's say the whole class), we would say,
 We gave one another pencils.