This might be the wrong place to post this question but I would like your opinions anyway.
I am running a large Adwords campaign for a client driving large volumes of traffic everyday producing large numbers of conversions on a daily basis. I have been running this campaign for a period of 6 month. Over this period we have been producing very consistent volumes of conversions, converting on a daily basis at almost exactly the same percentage.
During the past 3 weeks particularly on a Thursday our conversion rate is fluctuating massively. During the lead generation we are asking the users to fill in a form fill and it appears to be one particular page causing the drop off in conversions. When I test that particular page I never receive a problem so I have no grounds to know if this page is failing or not allowing the user to proceed.
The only issues that has occurred while experiencing problems with fluctuating conversion rates is problems with other sites the client have are failing. Which suggests there has to be a problem with the site I am advertising?
When speaking to the IT guy at the clients end, he is giving me no feedback as to whether or not the server or website could be failing for some people.
Like I say the Adwords campaign has been running for over 6 months producing consistent data, there has been no major change in PPC traffic or costs; it is purely down to conversion rates changing.