In AdWords I have 1 advert running only. The landing page includes a querystring so I can track it. EG, www.mydomain.com/products?source=CPC
I also use Google Analytics.
For February I have approx 1450 clicks in AdWords. This means, 1450 went to my website.
In Google Analytics, according to my landing page, there were only ~850 visits.
In Google Analytics, in the Acquisition -> All traffic page, it suggests that Google CPC brought 517 visits...
I know tracking tools are not 100% reliable but this figure seems to be showing something is very wrong.
How can I tell which of the figures is accurate or is this just a limitation of reporting tools?