What would cause a huge decrease in total links?
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After the latest crawl of one of my client campaigns in Moz, I noticed that their domain authority dropped by 3 since the last crawl just one week ago. That seems pretty drastic. I took a look around to see what might have been the cause, and in looking at the Links > Competitive Metrics > History section of Moz, I found that the site had a decrease of total links from 5,339 to 1,072 (see image) - also a drastic decrease. My question is, what would cause such a huge, sudden decrease in links over just the course of one month? I haven't changed anything up with the approach to their online strategy, in fact we have put increased emphasis on the creation of natural links so this huge decrease comes as a real surprise. I should also mention that Total External Links also decreased, but only from 243 to 205. Any insight into these numbers and what could have possibly caused such a drastic decrease would be very much appreciated!
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Thanks for the great input. I think we have figured out the issue, at least partially. This particular client had a Google+ page that they had kept up for several years - lots of posts with links back to the website. That G+ page was deleted this past week, which would explain the sudden disappearance of links. I doubt the page was accountable for 4,000+ links, but I'm pretty confident that is where the majority of the decrease came from. Thanks for the help!
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Shot in the dark but maybe a sitewide link was removed? e.g. you posted a comment on a blog, it appeared in the sidebar under "recent comments", moz picked them up, your comment is no longer recent, lose all the sitewide backlinks, see that drop.
If you've exported your backlinks previously when you had a lot, compare the current links to the old list and see where they differ.
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Hmm, that does seem a bit drastic!
Have you tried checking your links using another tool other than Moz? Maybe on the last Moz scan there was some sort of hiccup? Try checking your link using: https://ahrefs.com
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