Sudden shift in rankings?

[OUTsurance]

What would make a website move from position 14-17 (for the last year or so) to position 1 for a very competitive keyword when there are no obvious site changes?

[matt.nails]

OUT,

It may be due to some changes on Google's end:

https://www.semrush.com/blog/recent-google-changes-seo-tactics-that-move-the-needle-in-2017-semrushchat/

What do you think?

Matt

[OUTsurance]

Hi Matt,

Thanks for the link was a good read, I initially considered the effects of Possum however I would have expected to see some other sites perform better then so still not sure what could have caused this sudden jump.

Thanks

OUT