Advanced online casino players must always focus on what their opponent is thinking about their game. If your last hand was unbeatable and you won or if you bluffed and showed that you bluffed, your online casino opponent will accordingly make a decision about your next hand. If you can call with a weak hand, you may also raise with a weak hand.
Always apply some common sense when deciding when to raise for a bluff, even with a weak hand. As often as possible, try to get your opponent to make a wrong guess about your hand. This will make you unpredictable, and throw them completely off track.