Because you can quickly get exhausted of having to systematically indicate the username and password of your account to connect to Yahoo Mail, there is a very simple solution for this issue which is called the "keeps me login" option on the Yahoo login page.
However sometimes the "stay Connected" option is enabled on the Yahoo Mail login screen by default, still, Yahoo may ask you to log in each time you visit the Yahoo login page.
The problem is login cookies, which are bits of data that help identify you and tell Yahoo that you've been there before.
The cookie that your browser collects when you visit Yahoo Mail only connects to the browser and device you were using at the time of your visit. As long as you visit the login page with the same device and browser, you will not have to log in again and again.
If you try to log in with another device or browser, Yahoo will not notice the login cookie, so you will require to enter your username and password.
You can restrict your computer from deleting the cookies from your browser, including those for your Yahoo Mail login credentials, in several ways:
List of private browsing names and function:
Google Chrome: Incognito Mode
Microsoft Edge: InPrivate Browsing
Conclusion
This is how you can Stay Signed In To Yahoo account, well if you find any trouble while following these above steps, then you can read our complete article here or you can comment below to get help.