Not only is it free, it's also one of the world's largest databases of information and it's a great way to track mentions of your topic on the Web.
Ọ bụghị naanị na ọ bụ n'efu, ọ bụkwa otu n'ime ọdụ data data kachasị n'ụwa nke ụwa na ọ bụ ụzọ dị mma iji soro akụkọ banyere isiokwu gị n'Ịntanet.