It means registering but I have some high quality free scripts here: [https://shabba.io/google_ads_scripts](https://shabba.io/google_ads_scripts)
I’m trying to add a new free script every month too.
[https://nilsrooijmans.com](https://nilsrooijmans.com) is probably the current thought leader on scripts I recommend looking at his offerings.
Some of Google’s own scripts – like their landing page checker – are decent too: https://developers.google.com/google-ads/scripts/docs/solutions/account-summary
Generally, try and stick to newer scripts as a “new experience” has been rolled out recently which uses the new version of the API and an upgraded version of JavaScript.
I have a small obsession with scripts so lemme know if you have any questions.