ips4 Show pages where a specific widget is used

A while ago somebody at invisioncommunity.com asked how to locate the page where a specific widget is being used.

I thought this would be a handy information, so here we go:

OK... short long story if anybody else runs into this...
If you don't have the Pages App:

1. check your core_widget_areas database table

IF you're using IP.Pages:

1. check your core_widget_areas database table
2. check your cms_page_widget_database areas
3. check your blocks ( ACP => Pages => Blocks ) and the cms_blocks database table.