What does the "Develop" do in the menu bar in Safari

Just upgraded to Mountain Lion - trying to get to grips with the Develop tag in the Menu bar? only found it under preferences in Safari when trying to remove cashe - can anyone give me an idea where I can get more information on the use of the "Develop" ? cheers 

In fairness Bee, your link includes this:
The Develop menu allows you to show the Web Inspector, Error Console, Network Timeline and Snippet Editor or disable Caches, Images, Styles, JavaScript, Runaway JavaScript Timer and Site-specific Hacks.
Now, how many of us know what any of that actually does? I certainly don't have a clue what the Snippet Editor or Runaway Javascript timer actually does. And 'Site specific hacks' is also something of a mystery.
My conclusion is therefore that the Develop Menu options are for developers, not everyday users.
And the article you link to was written for Leopard. Malcolm is running Mountain Lion.
If malcolm needs further information on these options, we are going to have to do some serious research!

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