Why does it normally take too long to fetch any new research work to appear in the GS profile when it appears days before with Research Gate and also appears in all search engines, including Google but not with Google Scholar? Not sure Why?
I have different experience with RG & Google Scholar. My list of Google Scholar citations is valid and it has almost 50% of citations more than at Researchgate.
Dear Noor Zaman Jhanjhi , there are many related research questions about this problem. I am glad to share it here if you are interested in, many good contributions are given.
From my understanding, Google Scholar updates 3 times a week in 2-3 day intervals between each update round. Google Scholar automatically crawls and indexes information from major publishers (e.g., all journals published by Elsevier, Wiley, Springer, Taylor & Francis, SAGE, OUP, CUP, MDPI, Frontiers, ACM, IEEE etc.) as well as institutional repositories, pre-print servers and other scientific channels (e.g., also ResearchGate). I assume this is quite a time- and resource-intensive task and it therefore takes several hours for each update round. I guess there is also no real imperative on their end to update more often or even close to real-time. Sometimes if a paper gets published too late for a current or ongoing update round, it can take more than 3 days and it also depends on the publisher. Google Scholar is good/reliable and fast at indexing entries from major publishers and standard formats such as journal articles but might struggle with smaller publishers or non-standard formats (e.g., reports, book chapters).
It is not the speed that matters, but the accuracy of the data. RG does not provide reliable and accurate data on the number of citations dear Ekechi Stella Amadi .