If you use Chrome, and happen to use a lot of tabs, then you probably run into an issue now and again where a few tabs will slow down and give you trouble.
Chrome features a task manager just like Windows so you can target those tabs individually. To open the manager, just right click on an empty space in the title bar, and then select task manager. Or, you could also press shift + escape.
There, you can browse through the tabs individually and close those that are slowing you down.