With a target of _blank, the page will open in a new window.
sample-1a in a new window

With a new target name specified, the page will open in a new window.
sample-1b in window named hello

Using the name hello as the target again, sample-1c will open in the same window or tab.
sample-1c in window named hello
It was not given focus, so it is behind the other windows and tabs. You needed to select this window or tab to see it.