Alexa ranking

A customer of mine complaines that she has fallen down on her Alexa ranking. On 01/05/18 she was on rank 36.699 (approximately).
On 01/08/18 she was on a one >70.000 !
This is really weird. On 01/05/18 (during the night) there was heavy load (load average over 30). So I blocked 2-3 IPs. (but I am not aware of blocking Alexa spiders).
Any ideas what could have happened ?
Uwe DegenhardtIT-ManagerAsked:
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Dr. KlahnPrincipal Software EngineerCommented:
All search engines periodically change their ranking methods, so as a web server administrator you are shooting at a moving target and can't say "Well, that's done; it's optimized."  It's quite possible that Alexa rolled out a new ranking method at the start of the new year.
Lucas BishopClick TrackerCommented:
Here is how Alexa ranks sites, just as an FYI:

A site’s ranking is based on a combined measure of Unique Visitors and Pageviews. Unique Visitors are determined by the number of unique Alexa users who visit a site on a given day.

The term "Alexa users" refers to someone who has the Alexa toolbar installed in their browser.

Keep in mind that she was analyzing Alexa following the holiday shopping blitz.

During the holidays, most eCommerce sites will see an improvement in their Alexa score, due to an increase in shopping. Meanwhile, non-eCommerce sites will see a drop as they are usurped by shopping sites.  

Take for example the difference between Linkedin and Paypal during Q4:

It's a seasonal thing.

Did she see the same thing last year? Is her site a non-eCommerce site?

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Bryr de GraySEO TechnicianCommented:
Don't be too concerned with Alexa ranking or even Moz or whatever page rank that is. Be more concerned with the overall performance of your website in terms of search and web traffic as a whole. These SEO companies usually have their own set of algorithms. Be more mindful with Google, pay attention with the notices they send to you. Domain Authority (DA), Page Authority, Trust Flow - they're all made by different companies like Moz, Majestic, etc.
Uwe DegenhardtIT-ManagerAuthor Commented:
Hi Bryr de Gray,
Lucas Bishop,
Dr. Klahn !!
Your comments were pretty helpful for me and the customer. The customer wanted to make an inquiry directly at Alexa to find it out. But I guess it was just a tempory problem/algorithm change on their end or a temporary lack of good content in December 17. We will have to take an eye on this in the future. Thank you !
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