Newsletter Plugin with Link Tracker

Is this plugin released under GPL?

I didn’t specify any license and this means it will be the default license( I think is GPL 2 ).

It needs to be specified both in the plugin’s readme.txt file and on the plugin’s download page.

I need to include and the license ?

Ideally, yes. Or a link to the license url in the plugin’s readme.txt file.

I’ve linked to https://www.gnu.org/licenses/gpl-2.0.html