industry standard in many design houses.
packed with extensions to extend any missing features they may have missed out on.
http://www.adobe.com/cfusion/exchange/
I have heaps but i guess a good example is one that manages file permissions
plus hundreds more in third party installs
vibrant community with heaps of tutorials all over the web
http://www.google.com.au/search?hl=en&safe=off&q=dreamweaver+tutorials&btnG=Search&meta=
built in reference material from Orielly
for CSS ASP PHP JAVA SCRIPT SQL etc..
components are godsend
robust coding environment allowing database connectivity.
built in database connectivity for most common platforms
built in ftp
great site manager
awesome find replace ( code and text or one or the other )
etc.etc.etc.
if you bundle fireworks with your dreamweaver package, you gain a great vector creation tool that ties in very closely to the other products.
also you get freehand which is not so powerful but helps, I would go for illustrator here.
depends on your budget really.
now there is going to be people who will poo poo it and think that its not very good.
they will mention another package, notice how im not comparing it or poo poo ing other products.
they are most probably used to one particular package and love it to death, good on them for doing that, shame on them for poo poo ing.
make sure you invest in the latest after mx2004 so you gain all the new video implementation.
and of course the best thing you should do is when you have a good solid week to play with it, download the 30 day free trial.
http://www.adobe.com/products/dreamweaver/
and thats just dreamweaver
flash goes on and on, but from a game dev point of view its a complete 2d vector package to make your own games as well as what it does on the web in regards to adds and multimedia.