Apply Planning to Web search
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This is a homework, the question is : How would you apply the ideas of planning to Web search? Please answer at a high level; a paragraph or two will be sufficient.

I'm not sure what is the high level of planning, and don't know where to start. I read some papers about the information retrieval and web search but still cant connect them with Planning. Hope someone can give me some hints, like the relationship of planning and information retrival or web search. 