According to various embodiments, a method for generating from one or more keywords a list of recommended keywords for using in paid search advertising includes identifying, via a tool, one or more keywords to be used in a paid search advertising campaign at an identified website. The method may further include acquiring, by a crawler, content from a plurality of different web content sources via one or more networks. The method may also include applying, by the tool, to the acquired content an ensemble of one or more key phrase extraction algorithms, one or more graph analyses algorithms and one or more natural language processing algorithms to identify a set of semantically relevant keywords ranked by a relevance score. The method may further include generating, by the tool from the set of semantically relevant keywords, a knowledge graph of recommended keywords to replace or supplement the one of more keywords. The method may further include outputting, by the tool based at least partially on the knowledge graph, an enumerated list of recommended keywords to one of replace or supplement the one or more keywords to be used for the paid search advertising campaign at the identified website.
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