According to the analytics firm Union Metrics, brands that decrease the frequency of their posts tend to lose followers quickly. Your followers followed you because they want to see your content. Be consistent with posting, but don’t overdo it. If you post more than 2-3 photos or videos per day, use Instagram Stories so you don’t clutter your followers’ feeds. When posting photos, add a caption that contains a question for your followers. Make the question something thoughtful, or something funny. The more people that answer your question, the more popular your post will be. To respond to them directly, type the “@” symbol and type their Instagram name. This shows everyone that you’re down to earth and willing to interact with your fans. It may also be helpful to like comments others have left for you, especially when you can't think of a written response to give. According to an Instagram study, posts that mentioned another Instagram account (e.g., @instagram) in the caption encouraged 56% more comments and likes than otherwise.  For example, if you take a photo at a restaurant, mention the restaurant’s Instagram name (e.g., @olivegarden) in the caption. If you see something that reminds you of another Instagram user, snap a photo and post it with a caption like, “I thought of you, @[user]!” Unless you are already a celebrity, you need to put time and energy into becoming an Instagram sensation. Increase your responses to comments, respond to Direct Messages, and like tons of photos! If you have a creative idea and some fans, grow your community by giving away a prize in exchange for likes and follows. Choose a prize worth winning, share a photo of it on Instagram, and then encourage your followers to like the photo to enter. When the contest ends, choose a random follower to win the prize! Encourage your followers to tag their friends so they can also enter your contest. Websites like Statigram, Websta.me, and Iconosquare provide statistics that help you track your Instagram success. If you find that you...

===
Write a summary of the previous text in Vietnamese:
Cập nhật thường xuyên. Bắt chuyện. Trả lời người bình luận ảnh của bạn. Đề cập đến người dùng Instagram khác trong phần chú thích. Tích cực tương tác để phát triển lượng người hâm mộ. Tổ chức cuộc thi. Theo dõi sự gia tăng danh tiếng với công cụ quản lý số liệu thống kê.