Help me with my website issue

Hello,

Please help me in solving the issue coming on my websites it says

"Error establishing a database connection"

I have hosted my website on google cloud and i am not able to solve this issue even though i search for the solution online.

Please help me in solving that.

Thank you

Make sure you created a MySQL database and its user if required. That might be the cause of the issue.

Actually, i am not into that tech much so can you tell me how to solve it.

most common....mysql login configured wrong. but there's 100 other things it may be. all usually pertaining to mysql config. could just be your browser cache.
run through everything in this blog post https://www.wpbeginner.com/wp-tutor...ablishing-a-database-connection-in-wordpress/
if nothing fixes it i would just reinstall WP
hope u get somewhat technical. i ran into many wp issues and learned all about mysql/php/wp db administration due to wp's problems. you cant be reinstalling wp after every little issue.