Yah check is there a geo IP city/region/country spike on the page?

If your analytics setup tracks tracking IDs then correlate the page against IDs to see if one in particualr is a spiker   Penetration testing can be performed to simulate thousands hundreds of thousands of users. Its an IT function so you need to inquire internally with whomever manages your network...

Check if:   UVs relate to a spike with a particular page Is there and tracking IDs that also spike(perhaps marketing did a social buy?) look at any referring domains that may have spiked Did your IT team try any penetration test    

I would check  IT penetration testing or network blocking happening? Odd how its Microsoft related browser that is tanking the most.   Do most of your customers come from any IT group that maybe has strict Windows security browser settings?

Hi so your 2 beacons are a bit different and at different stages of purchase flow.   Beacon one is pretty easy looks good.   What makes me suspicious Beacon 2, I am wondering how are you creating a purchase event/transaction on the same page?   I would expect once cart add is done you then have user...

Hard to be more detailed but seems data elements or datalayer itself is not intact any more.   Check if you see Content Policy errors as well..(might be new browser version got stricter).  If datalayer is blocked or messing up some data element then this is definitely a source of apparent dropped tr...

Reply you are right what I meant was the ratio of Mozilla to all was increasing(windows 10). The drop is in Google users. So leads me to wonder if there is a prob in google as its losing users.(check for js errors)I also would then check Mozilla on a same page does it show any similar error events?

Hi when I  look at your trended info we see a migration from Chrome to Mozilla users.   If they are changing browsers could it be some sort of data blocking or browser/page code error in Mozilla that is tripping up activity map? Do some browser QA and see if there are any oddities.

ok glad I got you closer...   In my past I have worked with IT depts to get theoretical volumes for concurrency and what I do is look at last year.   Pick the single greatest volume day. Visits as it will give a bit more than Unique visits. On the big day I break down by hour pick the greatest hour....