Anita......First of all, you have only been with HP a little over a month. That is hardly enough time for you to be well-known. Furthermore, it is up to you to take the initiative to become visible on our mutual writing site here.
Obviously, if any of your hubs have made it to google and they are such that they are searched often, your traffic will grow in time.
If you are referring to views & comments amongst fellow-hubbers, this also take a little time, as well as your involvement in reading & commenting on numerous hubs a day......This is how you choose whom you may want to follow, as well.
There are several schools of thought on "traffic," earnings, etc. Many hubbers, especially those who have been here in excess of 4 years, who make a decent sum of money, get their traffic where it matters the most (outside of HP) These are the writers who write page one google articles, know how to circulate (pimp) their work and are fortunate enough to sell amazon and/or ebay products displayed on their hubs.
If, as you mention, a hub seems to simply STOP getting traffic for a length of time, you can always go in to edit. Add a capsule perhaps and up your word count, check over carefully for spelling & grammar, add a poll, photo or video. There are any number of ways to spruce up a hub.