Netlify Plans details

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[Support Guide] Making sure your builds use appropriate resources for Netlify's build system

updated in Dec 2022 Hopefully, your builds at Netlify “just work”, once you have things configured. That’s the intention and the common case, but for those times when your reality falls a bit short of our dream, this article talks in detail about some of the limitations that customers run into while building and how to work around them. The operation of Netlify’s build system is pretty well documented in several places such as: a somewhat conversational “how it works” guide. our official do…

To summarize, 1 CPU and 3 GB RAM is guaranteed for building the website. But your question seems more like serving the website, like in case of PHP hosts.

About daily users, it has less to do with RAM and CPU and more to do with bandwidth. Now if the bandwidth will be enough is up to how optimised your website is and makes use of caching.