This method is a shortcut for .on( "focus", handler ) in the first and second variations, and .trigger( "focus" ) in the third.The focus event is sent to an element when it gains focus. This event is implicitly applicable to a limited set of elements, such as form elements (<input>, <select>, etc.) and links (<a href>). In recent browser versions, the event can be extended to include all element types by explicitly setting the element's tabindex property. An element can gain focus via keyboard commands, such as the Tab key, or by mouse clicks on the element.Elements with focus are usually highlighted in some way by the browser, for example with a dotted line surrounding the element. The focus is used to determine which element is the first to receive keyboard-related events.
for more detail please check : focus()
In short either you have to assign tabindex to column or you have to add text inside anchor tag.
Let me know if you have any concern.