aristotle - 9:09 pm on Feb 3, 2013 (gmt 0)

what source of backlinks to look at for disavow candidates

Offhand I can think of four main categories of backlinks for which the disavow tool might be used:

1. "Unnatural" backlinks that you purchased or created yourself, especially those with targeted high-volume keywords in the anchor text

2. Backlinks that are natural but which the Google algorithm might mis-identify as "unnatural"

3. Backlinks that a competitor might have created to try to sabotage your rankings

4. Auto-generated spam backlinks from bad neighborhoods