A system for identifying keywords which may include a non-acquiescence information
collector operative to collect information indicating, for each individual website from among a
multiplicity of websites, at least one keyword which brought at least one user into contact
with said individual website but did not result in a defined criterion for acquiescence of a
user to at least one suggestion presented by said website; and a negative keyword definer
operative to define at least one specific keyword which brought at least one user into contact …