how to make a greeting?

[Romero]

how best, through a module can be a greeting - a description of the site and that it was only on the main page.

[ks-net]

hi this is kostas... how are you?

you mean something like this?
well it is already done!
don't you think?

[datahell]

Go to modules, click "New" from the top right toolbar, write your desired greeting in the editor field and assign this module to the menu item that links to frontpage.