“Flickering” or “Flash Of Original Content” (FOOC) is a phenomenon where there’s a (typically) slight but observable delay in the browser updating the site or element layout if the user is included in a variant group for experimentation. This manifests in the original, unmodified element being rendered in the visible portion of the page before the experiment library updates it with the variant. There are ways to mitigate the flicker:
The shadow DOM is a way to add HTML structures to the web page so that they remain isolated from the rest of the document object model (DOM). It’s a popular concept with web components, as it allows for encapsulation of web structures so that they aren’t affected by style declarations of the parent tree, for example. However, being such a “hidden” structure, anything that happens in the shadow DOM is also hidden from Google Tag Manager’s listeners.
One of the most versatile triggers in Google Tag Manager is the Custom Event trigger. As its name indicates, you can use it to fire your tags when an event is pushed into dataLayer. This process is at the heart of GTM’s dataLayer system. And it’s not just custom events. Every single trigger type in Google Tag Manager uses the event key in a dataLayer.push(), which is why you’ll see events like gtm.
With the proliferation of gtag.js implementations, we can see that there’s a small-ish paradigm shift in how to implement Google’s stack of marketing tools. As adding gtag.js snippets to the site code becomes more and more common (to cater to things like early Optimize loading), you might be at a point where you have lots of interesting information stored in the gtag.js queue but no way to access it in your Google Tag Manager tags and variables.
I’ve covered the more pervasive issue with tags not firing in Google Tag Manager in my article on the “Still Running” status. However, there’s an additional problem you might face with Google Analytics: tags that show status Failed, and which refuse to send any data to Google Analytics. There are a couple of possible reasons for this, and we’ll explore them in this article. Note that any tag type in Google Tag Manager can signal Failed.
With so many people working from home or remotely in these turbulent times, it’s time to revisit one of my oldest articles, and discuss the options you have for excluding or segmenting internal traffic in Google Analytics. The traditional method of IP address exclusion is not necessarily the best option anymore, unless all your employees use a specific VPN to connect to the site. In this article, we’ll go through some of the tools you have at your disposal.