You should indeed use the Views module as suggested in the prior answer.
However, to give ranking to content (as in your title), you could take this a step further. I.e. to automate the calculation of your "rank this content" field, by using the Radioactivity module. Some details about this module (from its project page):
... provides a field type which can be used as a hotness metric or a regular view counter for entities and for much much more. In essense, entities receiving attention (views or actions defined by Rules) are heated while inactive ones slowly cool down.
Refer to the article "Radioactivity 2: basics" for way more details / ideas about this very interesting module ...