Mentions and Tagging are important aspects of social media. Just imagine, something interesting incidence has happened in your locality. You may want to convey it to a news channel. Now you can mention the News Channel in your social media post coving the incidence in the social post.
If we upload a post on social media, we can tag the people in those photos with his/her name or profile names. Mentions and Tagging help social media channels to better connect with people.
You can tag your friend to congrats or convey anything to him/her. Your friend may get a notification about your tagging with him/her. Mentions and Tagging should be used in order to keep useful communication. Keep your tag settings properly. Thank you.