PhoenixNightly Actually, the icons are there to tell you how the font can be used, whether for embedding, documents, apps, etc. You need to check the License tab for any specific font you want to use because that is where the licensing information is contained. Free for commercial use with conditions is still free for commercial use, so Licensing is still required to be checked, you can't download every font off the site and expect it to not have conditions.
For example, the Aller free font license contains the following conditions:
This Free Licence Agreement supplements, and should be read in conjunction with, the standard Dalton Maag End User Licence Agreement version 1.2.
1 You, the Licensee, are granted the right by Dalton Maag to Use the Aller Font Family, Standard Edition under the terms set out in the EULA. This free licence has a Licensed Unit size of 25 Users.
2 Use by more than 25 Users, or equivalent Website Visitors, is a breach of this Free Licence Agreement, and instead requires a commercial licence.
Fontsquirrel Note: 1000 website visitors is the equivalent of 1 user.
3 Editions other than the Standard Edition of the Aller Font Family are not covered by this Free Licence Agreement, and require a commercial licence.
So it's always important to check the License tab, not the icons that tell you 'oh, I can use it in documents freely', when in this example there's in fact the condition of 25 users, which would be breached if you had more than 25 viewers of the font being used, .