In Reports → Top 100 triggers, you can see the triggers with the highest number of problems detected during the selected period.
Both host and trigger column entries are links that offer some useful options:
Using filter
You may use the filter to display triggers by host group, host, problem name, tags, or trigger severity. Specifying a parent host group implicitly selects all nested host groups. For better search performance, data is searched with macros unresolved.
The filter is located below the Top 100 triggers title. It can be opened and collapsed by clicking on the Filter tab on the left.
Time period selector
The Time period selector allows to select often required periods with one mouse click. The Time period selector can be expanded and collapsed by clicking the Time period tab next to the filter.