This is to give facts, background, and other kinds of knowledge of a subject

Inform is the word which means to give facts, background, and other kinds of knowledge of a subject.

Explanation:

In the English language, the word 'inform' simply means to give knowledge or explain something to another person. The information can be a single word to complete explanations about the occurrence of some phenomenon.

Even, gossiping about something also is a type of information as you are increasing the knowledge of a person in that particular context.

For example, telling your parents that at what time you will reach home.