A system (100), for providing feed-back based updateable content, comprising a text analyzer (TA) to analyze content to determine analyzed text vectors (ATV); a reader profiler (RP) to profile a reader in terms of analyzed text vectors to obtain reader classification vectors (RCV), dynamically forming clusters of readers, parsing served content through formed clusters to obtain cluster-specific analyzed text vectors; providing a first feedback output signal in correlation with a cluster of readers in correlation with a specific analyzed text vector; causing to provide changed content, to cause a change in said specific analyzed text vector; serving said changed content; parsing said changed content dynamically formed clusters to obtain changed cluster-specific analyzed text vectors; providing a next feedback output signal; checking if said specific analyzed text vector fits within pre-defined ranges of values, provided by optimum text analyzed vectors, across said clusters; and serving said changed content.