Twitter is useful thanks to the system of hashtags and retweets. Hashtags help recruiters find people by their occupation or the technology they work with (e.g., #projectmanager, #blockchain). As for retweets, they’re efficient when you know where to find them. Once we used them to locate Animation Artists: one user launched #portfolioday and retweeted posts of different artists with their works and contacts. It was very convenient for us.