Does no body like my shed?

[Howdya do that]

There is a tiny green dot on the envelope my beside my new post in the shed sections yesterday.
what does it mean?

[Treecycle]

It means you are online, and grey if you are not.

[Hermit]

There is a tiny green dot on the envelope my beside my new post in the shed sections yesterday.
what does it mean?

Or if you mean the one below, the green dot is to signify that you have posts in the thread.

300619

(There's a legend at the bottom of each index page that explains the purpose of the various icons.)