$ALIVE is a token from the "We Are Alive" Tribe. You can join the community and read a few posts to have an idea (https://www.ecency.com/created/hive-155221).

Also, you can follow this post (https://www.ecency.com/hive-155221/@wearealive/we-are-alive-tribe-guides-faqs-testimonials)

We have 3 tags mostly, #alive, #aliveandthriving and #larryisalive

By using the tags in the relevant posts, you can earn the tokens as the author rewards.