What does far right and far left mean? (In the context of the Weimer Republic and the popular modern Germany GCSE module)

As you know, in the Weimar Republic there were challenges to the Republic from groups who held far left beliefs, such as the Spartacists, and far right beliefs, such as the Freikorps. But what do the labels 'far left' and 'far right' actually mean? When we talk about politics we often use the labels 'left-wing' and 'right-wing' to summarise opposing beliefs on the political 'spectrum'. Imagine the political spectrum like a line. On the left, you have groups that are focussed on the community and equality. They believe that wealth should be shared equally throughout society and that workers should control their own businesses. On the right, you have groups who are focussed on competition and hard work. They often favour lower taxes, letting each keep what they work for, and don't want the government to give away too much (such as healthcare) for free. In the UK you might be familiar with the Labour and Conservative parties. The former is sometimes seen as being left-wing, the latter more right-wing. However, the Spartacists and the Freikorps are not just left wing and right wing; they are 'far left' and 'far right'. You might also hear the terms 'extreme left' or 'extreme right'. This simply means they are extremely left wing or extremely right wing, that they are on the far end of the political spectrum line, rather than in the middle. This can mean their policies are more extreme. For example, like with the Spartacists and the Freikorps, they might reject democratically elected government, seeing it as an obstacle to their political goals. Alternatively they might hold quite extreme beliefs, such as racism. What kind of circumstance might produce such extreme political views?**This segues the answer into the broader topic found on most GCSE syllabus; the cause and effects of the Spartacist Uprising / the Kapp Putsch.