Google’s John Mueller said that your SEO is not impacted by the way you implement your analytics software. That is assuming you don’t implement it in a way that blocks crawling and indexing, he added.
If you do a search in Google Search for [new years] related keywords, Google will bring back the confetti easter egg from last year. Google by default will throw down some confetti and then let you also add more confetti to the mix by clicking on the confetti popper.