It's useful to know when you have a new website referrer. Google Analytics is plagued with spam referral and you want to filter this out of reporting as quickly as possible to stop it from skewing your data. It's also helpful to be able to respond quickly to new referral traffic - maybe leave a comment or promote the new link on social media.
The script below will send you a daily email with links to any new referrers.
Start a new apps script project in Google Drive and paste in the code. At the top enter the view ID that you want to monitor and the email address that should receive reports.
Choose Advanced Google Services from the Resources menu and switch on the Google Analytics API. Then click the Google API Console link and enable the Google Analytics API there as well.
Finally pick Current project's triggers from the Edit menu and trigger the main function daily at a convenient time.
This script saves known referrers in script properties. For a site with lots of traffic this may run out of space in which case you might need to switch this out and write known referrers to a sheet instead.
Google just released an API for the mobile friendly test and so I've whipped up a script to send an alert if a web page violates their guidelines. This will run the test as often as you like and send you an email if it detects a problem. Alternatively if you're not mobile friendly it will keep emailing you until you fix any problems which might be a good motivational tool.
First start a new apps script project in drive and paste in the code below:
There are three variables you need to set, urlToMonitor is the full URL of the page to test, alertEmail is your email address (or whoever needs to be pestered) and runTestKey is the API key for the service. To get this go to the Google API Console, click Enable API, search for 'Google Search Console URL Testing Tools API' and click enable. Then click the Credentials option and generate a browser key.
Once you've configured the script choose 'Current project's triggers' from the Resources menu in apps script and set up a schedule for the mobileFriendlyMonitor() function.
Note that this currently just logs the overall score. There are a bunch of other values returned (like number and types of resources on the page) that you could choose to monitor as well. It would also be easy to extend this to monitor more URLs, or to send you an email if the score drops below a threshold.