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"Content Model" = the Content Model you want this form to show up for (By default some fields or dropdowns may not display anything until you type in a partial value e.g. islandoraBegin typing the PID of the content model you wish to associate a form with, and the name will auto-complete:)

"Metadata Datastream ID" = The datastream that the MODS form will create or edit.  (ie. MODS might be the datastream for a MODSXML file)

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Installing a form from GitHub, lets you look at forms used by other institutions or organizations.  Keep in mind, as mentioned above in the Please note: of step 4, that forms used by other organizations may have specific requirements or local metadata profiles that don't matter to you .  or cannot be covered here in this tutorial. Review any given documentation or READMEs from that provider's repository when possible. Also, keep in mind, Islandora is displaying content models on the web interface based on the MODS datastream, and the stylesheets installed on the form association are expecting MODS as input.  Not all, but definitely some forms available for download from GitHub work with other metadata formats.

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