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Ramdowhale is an upvot bot. You send him 1 sbd with your post's url in the memo and you get a healthy upvote. He sleeps a lot to keep his vote power up. The extension tells you when he wakes up.

Oh ok, so the extension is not necessary then? Does he upvote everyone's posts, as in, he charges up, upvotes, sleeps charges, upvotes the next person who sent him 1 SBD, and so on?

Here is the official Randowhale 101 guide from the sleepy whale:

https://steemit.com/steemit/@randowhale/randowhale-101-everything-you-need-to-know-about-randowhale

You may also what to check out my Upvote bot weekly digest:
https://steemit.com/steemit/@randystiefer/this-week-in-upvote-bots-6