Free speech refers to the right of expressing opinion without being restrained by any particular law made by the government or Law enforcement agencies.
Example: Freedom of speech includes the right.
Hate speech is any form of expression by which speakers intentionally humiliate against a group or a class of persons.
Example : A direct attack on people based on what we call protected characteristics.
Offensive speech can be defined as giving rise or likely to give rise to controversy or public disagreement.
Example : Any controversial issue.