A frameset is a sort of web page containing other pages in different frames within the main overall frameset. To the
browser, however, it appears to be a single page, and the browser will
display the title for the outermost frameset in its title bar, and will
ignore the titles of any of that frameset's "child" pages. This means that entering a name in the Title field of the Inspector will not display that name on the top bar of the browser (which it does normally).
There
are some JavaScript hacks that can be used to change this behavior, but
they only work reliably in one or two browsers, and thus are not widely
used. If you need the title of the page to reflect the actual page
content (and that is a very good idea), you might consider using Server
Side Includes instead of a frameset to present your information.
Using
SSI, you can combine the content of several different pages into one
single page, which is one reason you might have chosen a frameset in
the first place.