A backlink blast refers to using black seo practices and tools to generate thousands of links for a website within a few hours or within a day.
Different black hat seo techniques can be used to generate backlink blasts:
social bookmark blast
Backlink blasts can be detected by Google’s Penguin algorithm update due to the low quality and specificity of backlinks, due to backlink profiles and because of the quick massive production of links. For the last reason, massive blasts are remplaced by backlink drip feeding practices.