search engine and online database

what i have learn about this?

search engine is actually a web tools that been used to find some information and also entertainment.

there are a lot of web can be used as search engine.

for example

1.google

2.amazon

3.yahoo

and others.

so what i can actually understand from this topic is everything in the search engine can be good and bad.

so we need to actually look at it carefully and never underestimate

so thats all guys