Losing organic position in Google

[Torreto]

I am facing a very critical problem and would like to have your help.

Until Friday 03/10/2017 my site was increasing every day, it was reaching 600 a day, but at the end of Saturday I had a problem with my site and Saturday until 15h out of the air, I ended up fixing the issue and the site returned to normal operation.

I do not know if it was a sad coincidence, but my accesses yesterday and today (days 24 and 25) are practically zero, I imagined that it was some error on the platform, but I came to the conclusion that my positions in google (through the organic search) Were reclassified, that is, they had words that I was positioned on the first page and now I am on page 10, 9 etc.

Question, did this happen because my site went down the air and lost relevance or was it changed the ranking algorithms just when it hit my website?

What do I need to do to get back to my previous position?

I await opinions.

[Amrit]

If this has been since Friday, surely it will greatly harm the SEO. But if the site has a lot more relevant content than the others, it has everything to go back in time. Just let it settle down for one more week and see what improvement it brings.

[Gandhar Kulkarni]

I think losing organic position in google might be due to losing of high quality links. The best solution is you should build high-quality backlinks. And for that reason first, do competitor analysis.

[clarke]

It happens with the online web users. You don't need to get panic, and try to be focus on creating quality  content no your website. That would help you to gain higher rankings in some extent.

[pravinD]

There are many reasons for loosing organic position in google like you might have out ranked by your competitors, on page might not be well optimized, or your site might be loosing links.
You need to keep your website updated and have watch on competitors as how they build and market their sites..