Sometimes projects have too many strings and the developers want to show the translators what is important and what — not.
Here is how GlotPress helps.
First, if you can administrate a project, you can set priorities:

Setting a priority
Then, the translators can see each string’s priority:

High priority

Low priority

Hidden — shown only to admins
The new default sort order is by priority. Translators can also manually sort by priority:

Sorting by priority