Online harassment is the act of sending offensive, rude, and insulting messages and being abusive. This may include upsetting or humiliating comments on posts, photos and in chat rooms or being explicitly offensive on gaming sites.
If you are experiencing unwanted, repeated, obsessive and/or controlling behaviours that make you distressed or scared, you may be being stalked. There are many ways stalking can be perpetrated it is most likely to be someone you already know well such as an ex-partner. There are lots of people and places that can support you if you are being stalked.