Google Stacking is one of the spamming tactics used by spammers to get their links and content ranked in organic Google search. By spamming all the Google properties like google drive, google calendar stacks, google sheets, google drawing, google spreadsheet, google docs, google slides with junk and meaningless content, spammers hope to beat out legitimate competitors. One way to avoid this from happening is to make sure that you have a social media presence and are using it regularly.
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USING GOOGLE SPAM FOLDERS FOR YOUR LOCAL SEO KEYWORD RESEARCH