From the past one month my website`s ranking has been going on and off in google.com.au. What happens is that one of the keywords appears one day and then it vanishes from the search results for 4-5 days. On some other day the other keyword appears and then again it vanishes. I had 4 keywords in search results on 6th sep but now no one of them is present.
I checked in webmasters that my website has 4200 links from a single website, can that hurt my website`s reputation?
Please suggest me something to bring my rankings back