From a Google Scholar Blog Post by Anurag Acharya:
Scholar Metrics provide an easy way for authors to quickly gauge the visibility and influence of recent articles in scholarly publications. Today, we are releasing the 2019 version of Scholar Metrics. This release covers articles published in 2014–2018 and includes citations from all articles that were indexed in Google Scholar as of July 2019.
Scholar Metrics include journals from websites that follow our inclusion guidelines and selected conferences in Engineering & Computer Science. Publications with fewer than 100 articles in 2014-2018, or publications that received no citations over these years are not included.
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Scholar Metrics include a large number of publications beyond those listed on the per-category and per-language pages. You can find these by typing words from the title in the search box, e.g., [security], [soil], [medicina].
Learn More, Read the Complete Blog Post
Direct to 2019 Scholar Metrics