Talk about Google and Yahoo! , Microsoft. also Search Engine.
This Materials For Study meeting series of our department is latter part. (First Part is the " Revolutions".)
32. Quality of
Search Engine
• Crawler
– Advanced Crawler
– Many many spider
• Huge Index
– Innovation Algorithm and Statistical pattern
– Huge Databases.
• Query
– Tag, Accurate Metadata.
– Google has over 100 factors.