Don’t start your tweets with an @ mention if you want to ensure that the mention is seen by everyone in both your Twitter feed and the recipient’s. Opening with a direct @ is considered a reply, not a mention.
Example: Starting a tweet with @WorkSurvival will ensure that the message is seen only by you, the editors of Communication Briefings and your followers.
Instead, embed the @WorkSurvival mention somewhere else in the tweet, or start with a period and then insert the @ mention. That will result in your tweet being seen broadly across both feeds.
— Adapted from “10 Social Media Mistakes to Learn From,” Carly Stec, HubSpot Inbound Marketing, blog.hubspot.com/marketing.