Quick Search enables you to quickly find matching text across all visible columns. 
Because it is such a popular function we have embedded it in the right hand side of the Dashboard Header (though there is also a Quick Search Toolbar you can use)
In order to refine your search, you can use wildcards like '*' (starts with) - see the Developer Documentation for a full list.
Quick Search Predefined Config allows you to set the style of matched cells and whether to hide or show rows with no matching cells.
In this example we have made the following changes to Quick Search Config: than the default option, chosen t for any columns that start with 'g'.
Selected a darker yellow to highlight cells
Chosen to hide all non-matching rows (ie. any row that has no visible cells that contain the search text)
Searched for 'g*' - this will return any cells that contain text that starts with 'g'