Tim Capper: isolate the date range that the traffic spike appeared.
Then look at your landing pages, and use secondary to see what keywords werer used to arrive at those pages.
The types of pages that were landed on should also provide a great insight - what were they ?, how was the content on that page stuctured, what was different with those pages.
Also were there any referes to that page, was the page recommended by another site ? - develope a relationship with them
That looks like a pretty specific spike across the Christmas period. It might help if you can let us know what niche the site is in, and products/services you sell (if any). ;
Find the keywords that drove these visits, and find out how your rankings have changed, if at all. You can use Webmaster Tools to get more data on search queries (given the data privacy in analytics). ;
On first impression this doesn't look like something related to general ranking changes. There has to be something trend, season, or exposure based here. ;
Tony McCreath: Dig deeper to find out where the traffic came from and what caused it. As +Tim Capper said, repeat it.
I'm also seing that traffic post the peak is higher than before. So not only did it you get a flurry of interest but post event your coming out stronger.
S?awomir Zdunek: It seems to me that the spike is very closely related to Christmas season (nothing discovering :). I guess the website must provide products or servises connected with it. Without knowing the overall profile of the website it is hard to say what happened. I would have a look at the keywords from that period (if they are provided and the search wasn't encrypted)
Prem Nath Vishwakarma: +Sławomir Zdunek ;Pls describe more, which is helpful for me.
S?awomir Zdunek: +Prem Nath Vishwakarma ;I would analyse the keywords in Google Analytics and check which keywords were used to drive the traffic to the website. If the users were logged to their Google accounts then the situation gets a bit more complicated because you won't see any keywords or you will see "keywords not provided". ;
Tim Capper: Hey +Prem Nath Vishwakarma ; isolate the date range that the traffic spike appeared.
Then look at your landing pages, and use secondary to see what keywords werer used to arrive at those pages.
The types of pages that were landed on should also provide a great insight - what were they ?, how was the content on that page stuctured, what was different with those pages.
Also were there any referes to that page, was the page recommended by another site ? - develope a relationship with them