Answer:
The word/phrase "craving attention" in paragraph one indicates that the author believes that some critics have a negative viewpoint of selfies, stating that they are taken only by narcissists who crave attention. The author's point of view is that this opinion is not valid, and that these critics are out of touch with reality. The author implies that taking selfies and participating in social media is a normal and common activity, and that most people understand and appreciate it as a form of communication.