When you are running a web site, you have to pay for
the network bandwidth that sending your pages to visitors
consumes (of course, the T-Files are way too small for
this to have any effect, so by all means do not let this consideration stop you from frequently visiting).
One way to cut down on bandwidth usage is to compress the pages
before sending them out. The visitor's browser can then
decompress the data before displaying it. All modern browsers support this method, but not all web sites make
use of it, which is surprising because it can save real
money for popular sites (it also reduces the page load time
on slow connections). Sites that do make use of content
compression include Google and Slashdot. One reason why
it is not omnipresent could be that it is not set up by default
in the popular Apache web server. You have to install the optional mod_gzip (Apache 1.x) or mod_deflate (Apache 2.x) module and configure it.
You have to tell it, for example, what to compress and what not (it basically only works for text and does not make sense to try to compress images, which are already optimised in this regard).
So when you get the top pages
of the T-Files (26546 bytes) and Weblog Japan (4044 bytes) I am actually sending you much less (9144 and 1570 bytes).