I don`t rank anymore, what is happening?

Selected answers from the Dumb SEO Questions Facebook & G+ community.

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  John Smith: Or google deindex your page, or your competitors “helping” you to lose rankings...
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  Fikri Anugrah: You should check again your website, i`m afraid there was a seo attack to your website.. i think if you lose the ranking by your competitor it would not like that CMIIW
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  Kristen Hansen Lowrey: Fikri Anugrah how could someone attack my site? what would they do?
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  Fikri Anugrah: Kristen Hansen Lowrey some people using this trick to gain upper rank to beat their competitor, the common trick is giving the competitor bad backlink or bad anchor text so google will think your website have a problem and not relevant for that keyword..it`s just a theory im not doing it and not having the attack for my self 😅 but maybe you can check it further about this thats just my thought when i read your comments
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  Kristen Hansen Lowrey: Fikri Anugrah thanks Fikri I’ll look into that. It would surprise me. I’m a little fish in a big pond....
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  Fikri Anugrah: Kristen Hansen Lowrey you`re welcome 😁
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  Christine Hansen: Did you change location or did you change the search engine into another country or the program that you use? Did you forget to change it back? Do you check SERP manually?
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  Kristen Hansen Lowrey: Christine Hansen No, nothing like that. I use SEMRush to check my site.
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  Christine Hansen: Okay, then it`s not here the problem stems from.
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  William Jones: Could be a million reasons need your link to do an audit on the site and backlinks etc
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  Kristen Hansen Lowrey: William Jones it’s kmlowrey.com
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  William Jones: Kristen Hansen Lowrey sent you the report
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  Christine Hansen: Any problems in GSC that you haven`t yet fixed?
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  Kristen Hansen Lowrey: Christine Hansen I’m looking into that. There are some crawl issues I need to fix.
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  Deb Dey: can check .. unless it is a super niche site and you don`t want to reveal the niche. you can pm me the url
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  Kristen Hansen Lowrey: Deb Dey I’m happy to share the site. It’s kmlowrey.com
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  Imran Zahid: I think ur targeted page is disappeared from google search result...means ur page is deindexed..