What is PID? It seems to be very popular recently, does anyone understand it?

📢 Gate Square #MBG Posting Challenge# is Live— Post for MBG Rewards!
Want a share of 1,000 MBG? Get involved now—show your insights and real participation to become an MBG promoter!
💰 20 top posts will each win 50 MBG!
How to Participate:
1️⃣ Research the MBG project
Share your in-depth views on MBG’s fundamentals, community governance, development goals, and tokenomics, etc.
2️⃣ Join and share your real experience
Take part in MBG activities (CandyDrop, Launchpool, or spot trading), and post your screenshots, earnings, or step-by-step tutorials. Content can include profits, beginner-friendl

🎉 Gate Square’s "Spark Program" Surpasses 1,000 KOLs!
💥 The creator ecosystem is in full bloom!
📈 Get featured, earn rewards, and grow your influence—what are you waiting for?
💰 Cash incentives ✔️
🚀 Traffic support ✔️
👑 Exclusive verification ✔️
From 0 to 1,000 in just weeks—Gate Square is becoming the epicenter of Web3 content! ⚡
You’re not just posting content, but the next "viral opportunity"!
🌟 Join the Spark Program and kickstart your breakthrough!
👉 https://www.gate.com/announcements/article/45695

📢 #Gate Square Writing Contest Phase 3#  is officially kicks off!
🎮 This round focuses on: Yooldo Games (ESPORTS)
✍️ Share your unique insights and join promotional interactions. To be eligible for any reward, you must also participate in Gate’s Phase 286 Launchpool, CandyDrop, or Alpha activities!
💡 Content creation + airdrop participation = double points. You could be the grand prize winner!
💰Total prize pool: 4,464 $ESPORTS
🏆 First Prize (1 winner): 964 tokens
🥈 Second Prize (5 winners): 400 tokens each
🥉 Third Prize (10 winners): 150 tokens each
🚀 How to participate:
1️⃣ Publish an

📢 Gate Square #TopContentChallenge# is coming! Post high-quality content and win exclusive rewards!
🌟 We will select outstanding posts for exposure, and help elevate your influence!
💡 How to Participate?
1.Add the #TopContentChallenge# tag to your post.
2.Posts must be over 60 characters and receive at least 3 interactions (Likes/Comment/Share).
3.Post may include only the #TopContentChallenge# tag.
🎁 We’ll select 1 top post to win $50 Futures Voucher every Tuesday and Thursday!
📃 High-quality posts will be shared on Gate Square and labeled as [Featured Posts]!
📌 Rewards will be distribu