In Slack, each user has a Member ID that serves as their unique user identification.

You can obtain the Member ID using the following method.

1️⃣ Click the profile icon of the user whose Member ID you want to get.

2️⃣ Click the three dots "•••" on the profile.

3️⃣ Select "Copy Member ID" to copy the ID to your clipboard.

🎉 That’s it!
You’ve successfully copied the Member ID in Slack.