Google Scholar & Peer Review
It's important to note that not all content indexed by Google Scholar has necessarily undergone peer review. Google Scholar includes a wide range of sources, and some may not be from peer-reviewed journals. You should carefully evaluate the sources and consider the credibility of the publication before relying on the information.
Note: Google Scholar does not provide a search filter to limit to only peer-reviewed articles.
If you want to ensure that the content you are looking at has undergone peer review, you should look at the article's citation, find the journal's title, and then locate the journal's publisher site through Ulrich's Periodicals Directory.
To learn how to verify peer review in Ulrich's, see this guide.