During a hangout, one SEO professional was concerned about backlinks and their disavow file. They are a large e-commerce site, and there are at least a million or so backlinks pointing back to their site.
They have a standard procedure to check spammy backlinks every month, and maybe every several months.
They just noticed that the upper limit of Google’s Disavow tool is approximately 2 MB. They are wondering what would happen if their file has exceeded the limit, and how to deal with these spammy clicks.
John explained that he would recommend trying to use the domain directive as much as possible in the disavow file.
This will cut down on all the spammy single pages. Also, don’t focus too much on cleaning up all links, because that’s always impossible.
John then said he would really focus on using the disavow tool for links that make it seem like you bought them or that there was some sort of exchange that took place. If someone from the web spam team were to examine those links, and they felt 100% convinced that those were questionable links, then those are the links you definitely want to disavow.
For all the random links that a website gets, and even from spammy pages, copied pages, or random forum posts, these are links that you do not need to put in a disavow file.
This happens at approximately the 27:19 mark in the video.