Advanced Filters & Gadgets sits on top of Jira, so a few words mean something specific here. This page is the short version of all of them.
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The one distinction worth learning first: a Jira filter is Jira’s own saved search and decides which work items come in. An advanced filter is what this app adds on top, and decides how they’re presented.
A saved search in Jira, owned and shared in Jira. It decides which work items an advanced filter reports on. This app never changes it and never widens who can use it.
Advanced filter
The reusable reporting layer you build on top of one Jira filter — controls, metrics, views and queues. Gadgets read it, so editing it once changes every dashboard using it.
Filter library
The list at Apps → Advanced Filters showing every advanced filter you administer or are allowed to use.
Someone who can edit one advanced filter’s configuration. Not the same as a Jira admin, and it does not let them see work items.
Grant
One of the four site-wide permissions in Access policies: create filters, manage all filters, run bulk operations, export usage and backups.
Archived filter
A filter hidden from the main list but still working on dashboards. Still counts toward the site limit; only deleting frees a slot.
“Administrator” is the word most likely to trip people up. Administering an advanced filter lets you change how it reports. Seeing the work items still depends on Jira sharing the underlying Jira filter with you — see Sharing the Jira filter your viewers need.