Google Scholar scrapes arXiv and coalesces the results with journal updates, i.e. it will show the entry for a new journal article with a clearly visible [PDF o

Google Scholar scrapes arXiv and coalesces the results with journal updates, i.e. it will show the entry for a new journal article with a clearly visible [PDF on arXiv] link when this is available. Google Scholar also scrapes institutional repos (at universities etc.).