Today I'm going to tell you about the Museum of Archaeology in the centre of Moscow. There are many interesting things. I saw the treasures which were found in this location many years ago. The museum was created in 1996 when the arhiological dig was finished. Nowadays it is (or you can use " it's ") a very interesting place but if you decide to visit the museum you should take a guide. Unfortunately without a guide and their explanations the museum is very poor.

The 'how' part of the question is asking you to consider what the causes are. For example, what caused the problem? You may also want to consider what factors have an impact on the problem (what makes the problem worse/better) and how the problem has developed. An 'outline' typically involves giving a description with some detail but not a massive amount so you may want to focus more on the initial causes.