When the bullies try to physically hurt or torture someone, or even touch someone without his/her consent can be termed as physical bullying.
It is when a person taunts or teases the other person.
When a person or group of persons gossip about another person or exclude them from being part of the group, can be termed as psychological bullying.
When bullies make use of social media to insult or hurt someone. They may make comments bad and degrading comments on the person at the public forum and hence make the other person feel embarrassed. Bullies may also post personal information, pictures or videos on social media to deteriorate some one’s public image.