Why Has My Google Ranking Dropped suddenly and dramatically is explained in this video tutorial https://youtu.be/5xnrBlD1K5A also details what to consider.
Google Search Console can be your friend when analyzing Google search engine ranking losses, to learn more about Search Analytics Report visit:
At the end of the day, it may be the case that others such as your competitors are doing all the right search engine optimization so thus out ranking your website and keywords. To learn how to SEO visit:
And to find out how you can easily out rank others visit RankYa SEO blog
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