Yes, although it would be better to use a role, and put the group into that (i.e. have a role like "viewer" defined globally, put the rule "Browse = role (viewer)" into the permission scheme, and then put your users and/or groups into the role of viewer in that project. That lets you have more control over each project using that permission scheme.
I'm really really sorry, I've messed up. Confluence doesn't have roles. When you started talking about tasks, my brain went wrong and slipped into JIRA thinking, and my last comment is completely wrong. I'm afraid you'll need to go through all of your spaces and make sure that there is a group granted "view" permissions for every one. Might be easiest to just use "confluence users" if you want everyone one to see everything.
Most of us don’t need much convincing that stakeholder management is important. It just makes sense that keeping everyone in-the-know on projects and assigning clearly defined roles is key to having ...
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