Okay kiddo, so in the United Kingdom, there are these things called pressure groups. Pressure groups are like teams of people who work together to try to change things that they think are important. They want the government to make laws or do things that will help their cause.
For example, let's say some people are really worried about climate change. They might form a pressure group called "Greenpeace" to try to convince the government to make laws that will help the environment, like using less fossil fuels or protecting endangered animals.
Some other examples of pressure groups are groups who work for better healthcare, education, or animal rights. There are lots of different pressure groups in the UK, and they are all trying to make a difference in their own way.
These groups might do things like hold protests or rallies, write letters to their members of parliament (or people who work for the government), or even run ads on TV or social media to get their message out.
So, pressure groups are just groups of people who care about something and want to try to make a change by putting pressure on the government to help them out.