my software update is not applied on my macbook air

The Age of this computer will Govern what newer version of macOS it will Qualify to install. Use About this Mac from the Apple Icon on Desktop - the required Information will be there.

With the above information in-hand - follow this How to get old versions of macOS and verify what version this computer Qualifies to install.  For Best results use Safari to commence the download as Others may not work.

Safari will open a redirect and open the Apple Store where the download can commence

One may consider upGrading to High Sierra first if considering upgrading to any version above High Sierra. This may better position the computer for the Drive Conversion to the newer APFS format as well as any EFI BOOT ROM required to use the newer file format.

Tips Big Sir Upgrade

Tips Monterey Upgrade 

Make Time Machine Backup  is very useful and can be used to Revert to Previous Working macOS

Notation - Mojave is the Last version to support 32 bit applications / extensions and Drivers. Catalina, Big Sur & Monterey supports only 64 bit and there is no workaround.

Suggest using Go64 to find 32 bit application before attempting the upGrade. Some or many of the Application already installed may required update or upGrades to 64 Bit Versions.

Are there any AntiVirus, Disk Cleaner, Optimizers, Un-installers, etc installed which should be removed as per Developers Instructions. They are useless, unneeded, cause havoc and interfere with the normal operation of the OS and may even Corrupt the OS requiring a Reinstallation

aziza115 wrote:

I tried to do software update for my macbook it I'm not succeeding and weird page id shown on my safari overtime i'm trying to search for something!

You are exceptionally adept at making your descriptions as vague as possible.

When in Software Update, does it offer the update you want? If so, what happens when you click the button to install the update?

If it doesn't offer the update you are expecting, have you confirmed your Mac can run that update?

If you want to upgrade your OS to Monterey, have you looked in the App Store for the Monterey upgrade? If you found it and clicked on the Get button, does it fully download and start the installer? If so, where does it fail to install?

I need more details. What have you tried and were there any error messages.