I’m not good at English. Please understand.
My company’s marketers created the url as follows :
But, when I check visitors’s record in log_visit table of databases, the campaign datas don’t exist in some columns.
They asked me about missing data. I tried to find the cause, but I do not know.
I want to know the cause of missing data or keyword for searching.
Is it the problems of web server or piwik or browser or site?