Jupiter is also known as Guru. Guru means the heavy one. In which ever house he sits in the chart, the native feels a heaviness in that particular area of life.

What do I mean by heaviness? - There is a strong sense of ethics and morality. As if a thousands eyes are looking at you. There is an extreme pressure on native to do good and not mess up the significations here.

For example: Jupiter in 10th house of the chart. Native shall feel a sense of heaviness in his/her career. S/he feels an extreme pressure to do always right and at right time.