How we can find website error if campaign is running on website

hii
how we can find error if on website running multiple ads

Not sure I understand what you are asking. Can you give us an example of what you mean?

i have one website in core php with multiple language like css,js html,bootstrap ,jquery . i have good traffic on website but i am getting some loading time issue also we using third party ads in website , but i get some error if i impliment any third party ads and and website speed does not good so how i can fix this error