Installing GoBLE library

Hi
I'm an Arduino newbie. Trying to get my Arduino to connect via the GoBLE app. The tutorial states I need to install the GoBLE library and the Metro library. I have located these in GitHub but cannot seem to import these into my Arduino library. The file type I need is a zip file but I cannot find the right file on Github and am lost.
Any help would be wonderful.... thank you very much

Perhaps this will help: downloading zip from github

Thank you that really helped. Realised I needed to save the files within the Github as separate Zip files and then I could upload.
Much appreciated