Hi @puneet1301 ,
Welcome to the community!
Do you have other device(s) which having the same issue? If this is the only device affected you may try to follow the troubleshooting steps available on the articles we posted below.
Wi-Fi troubleshooting steps - No Internet/Connection
Easy Steps to Improve Wi-Fi Connection In Your Home
Wireless Channel on your modem - what is it and why should I change it?
Let us know how it will go.
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