Lets say my website looks like this:
So the parent page will list the last 3 news messages. For each news message there is a sub-page. For the parent page I was thinking of setting the page title to: News - Hello world, Foo, Bar.
Now if somebody adds a new message the title tag will also change. I googled this and read a few blog posts where people said that changing the title actually hurts the ranking of that page.
So is this true? Should I just set a static title tag for all my pages?