please help to explain this words "the works"

Some thing that you have done, maybe it does meaning

3honor has given an explanation of the origin of the usage which I haven't looked into or heard of before so I won't comment on its accuracy any further than to try to answer your question in that response. As far as your original question goes, one example is from the area of food and would involve a hamburger or sandwich and asking for "the works" on one of those would be asking for most of the ingredients offered for a category of them by a restaurant or host. For example for a hamburger it might include: the bun of course, the meat, cheese, lettuce, tomato, pickles, onions, mayonnaise or mustard or both or some sauce and, these days there are many other possibilities that could be included.