Explore alternatives for placeholder (hint) text in global search

Problem

People regularly seem to think the best way to find issues is to navigate to the issues page then try searching from there. They usually overlook the search bar at the top of the page. Maybe they are used to other tools where that search bar is for something else? The placeholder text also doesn't really tell you what you can search for.

Today it just says "Search or jump to...."

Solution

Consider hints about what you can search for. Like "Search issues, projects, ...". Or we could even consider having a rotation on there of different hints.