To save the screen.
Nowadays, there isn't one. It used to stop monitor burns back before LCD screens came out. The constant movement of pixels prevented one pattern form being burned into the screen. Even though it is unnecessary, the system stuck and so we still have a screensaver today.
Hope that answers your question.
The screen saver is just something to have when your computer is on sleep instead of just a blank screen.
The screensaver was originally created to keep images from burning into the screen of CRT displays. If an image, say a spreadsheet, was to sit on the screen for long periods of time, the image would burn into the phosphors, leaving a ghost image.
The advent of LCD monitors made the screensaver unnecessary as they don't have the burn in problem. They are now used for entertainment or security purposes.
To save the screen.
A screen saver is the thing when you turn on your computer and it says internet. BUT the SCREEN SAVER is the thing BEHIND where it says internet. Like the picture.
if you hav windows 7 u can set it as ur screen saver from right click on destop>personalize>screen saver>screen saver scroll>bubbles>apply> OK ur done! ;)
It Depends On Which Computer You Use.If You Have Windows Vista:3: Find "Personalize"4: Find "Screen Savers"5: Select The Screen Saver and click OK.------------------------------------------------------------------------------If You Have Windows XP:1:Right Click DesktopNote: You Must Right Click Where There is no Icons and Side Bars.2:Click "Properties"3:Click Screen Saver Select The Screen Saver and click OK.------------------------------------------------------------------------------If You Have Mac:From the Apple menu, choose System Preferences to open the System Preferences window.Click the Desktop & Screen Saver button to display its preferences.Click the Screen Saver tab to display just the Screen Saver preferences. All installed screen savers appear in the left pane. The right pane displays a preview of the selected screen saver.Click one of the Screen Saver items in the left pane to select it for use.If you'd like, click Test to see what the screen saver will look like in use.
It prevents the screen from having images burned into it.
Screen savers were developed to prevent a problem call ghosting, in wich images could be etched premanently on a monitors screen.
User profiles, group profiles, screen saver passwords
If you have a Windows XP or any other Windows program, exit out of everything, which leaves you with the desktop screen. Then you RIGHT click on the desktop screen. Go to properties and if you look at the top, there are little tabs that say: Themes Desktop Screen Saver Appearance Settings Well, apparently, the tab that you want to click on is the SCREEN SAVER tab.
If your screen is running a screen saver, then you already have it. It is already saved on your system.
From the Desktop & Screen Saver section of System Preferences select the Word of the Day screen saver from the Apple section in the left hand pane. This will display words from the Dictionary which can be found in the dictionary by pressing the D key.
You can customize your Windows appearance by following steps..Right click on Desktop and click on PropertiesYou can change you Theme from "Theme" tabYou can change your Desktop Background from "Desktop" tabYou can set or remove Screen Saver from "Screen Saver" tabYou can change the appearance from "Appearance" tabYou can change the Screen Resolution and Color Quality from "Settings" tab
Screen savers are changed in the Desktop and Screen saver section of the System Preferences. Select the desired screen saver in the left hand pane or tick the Use random screen saver box.
I great site to find a screen saver of Bible Verse is to checkout Cnetdownloads.com they have this screen saver available for no cost. Another site to checkout is crosscards.com they also have this screen saver for free.