Why do we experience seasons? And why is this different between the different sides of the world?

The Earth is on a tilted axis, a full rotation takes 24 hours and this is our day length. As well as spinning on its axis, the Earth also orbits the Sun. This orbit takes 365 days to complete, but it's the tilt of the Earth's axis and the resultant direction towards/ away from the Sun during this orbit that influences the seasons we experience. A common misconception is that it's the distance away from the Sun that causes the change in seasons, however it is actually the orientation of the Earth towards the Sun. This is also why different parts of the Earth experience the seasons at different times. The Earth is divided into two hemispheres, Northern and Southern, these will experience opposite seasons as when one is facing the Sun, the other will be facing away and having less daylight. For example, in June the UK experiences summer with higher temperatures and more daylight hours. Whereas, in Australia (southern hemisphere), it is winter with less daylight hours, as the tilt of the Earth's axis causes this side of the Earth to face away from the Sun.