[SalesForce] the significance “Development Mode” on User Record details?

I can see a "Development Mode" flag for the User-Records under System Administrator profile and not able to see in other Profiles.

I am using the DEV ORG. Can someone tell me the significance of this Flag and its impact on the system based if its selected or not selected?

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Best Answer

With development mode enabled, you will be able to edit visualforce page and classes right in the browser, without using developer console. Below every Visualforce page, you get a new section (which can be minimized) to edit it as shown below.

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You can also see the "view state" of the visualforce page.

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