Complex sentence: Tim O Reilly, who first mentioned the concept of "Web 2.0", stated that "Web 2.0" provided communication platforms that were "user generated", with self-produced content, giving people more initiative for increased communication with friends as well.
Split into simpler sentences: Tim O Reilly first mentioned the concept of "Web 2.0". He stated that "Web 2.0" provided communication platforms that were "user generated", with self-produced content, giving people more initiative for increased communication with friends as well.