Quite simply it's about getting new elections. That was the aim of the protests. Then the president put up some very nasty laws and rioting started.
The laws have been repelled, though. I think. It's pretty calm at the moment I believe. Certainly not the chaos and fights it was during the 19th-25th of January. There are enough rumors that Putin will help the Ukrainian president back in full power after Sochi. Rumours are rumours, of course.