Why do i have to sign in to gmail every time

There are several reasons why you might be prompted to sign in to Gmail every time you open it:

Session expiration: Gmail sessions typically expire after a certain period of inactivity (usually 30 minutes to 1 hour). When the session expires, you'll be prompted to sign in again to access your account.
Browser settings: If you're using a public computer or a browser that doesn't store login credentials, you might be prompted to sign in every time you open Gmail.
Two-factor authentication (2FA): If you have 2FA enabled on your Gmail account, you might be prompted to enter a verification code sent to your phone or another device every time you sign in.
Account settings: Check your account settings to ensure that your browser is set to remember your login credentials. You can do this by going to your Google Account settings, clicking on "Security," and then selecting "Signing in to Google" and "Stay signed in" (if available).
Browser extensions or add-ons: Some browser extensions or add-ons might interfere with your Gmail login or cause you to be prompted to sign in repeatedly.
Cache and cookies: Clearing your browser's cache and cookies can sometimes resolve issues with login persistence.
Gmail app settings: If you're using the Gmail app on your mobile device, check the app's settings to ensure that it's set to remember your login credentials.

To resolve the issue, try the following:

Check your browser settings and ensure that your login credentials are stored.
Clear your browser's cache and cookies.
Disable any browser extensions or add-ons that might be interfering with your login.
Try signing in to Gmail using a different browser or device.
Check your account settings to ensure that 2FA is not enabled.
If you're using the Gmail app, check the app's settings to ensure that it's set to remember your login credentials.

If none of these solutions work, you can try contacting Google Support for further assistance.