●●● ●●●● ●●●●● ●●●● ●●●●● Why Web spam is bad ●●●● ● Bad for users o Makes it harder to satisfy information need o Leads to frustrating search experience o Bad for search engines Wastes bandwidth, CPU cycles, storage space o Pollutes corpus(infinite number of spam pages Distorts ranking of resultsWhy Web Spam is Bad ⚫ Bad for users ⚫ Makes it harder to satisfy information need ⚫ Leads to frustrating search experience ⚫ Bad for search engines ⚫ Wastes bandwidth, CPU cycles, storage space ⚫ Pollutes corpus (infinite number of spam pages!) ⚫ Distorts ranking of results