No it is not "a really important error" for SEO. It is irrelevant for SEO.
It may or may not be important for user experience but Google doesn't care how many H tags you have or which H tags you use or even whether you use no H tags. Google has confirmed this repeatedly in links I have posted elsewhere in this forum.
No it is not "a really important error" for SEO. It is irrelevant for SEO.
It may or may not be important for user experience but Google doesn't care how many H tags you have or which H tags you use or even whether you use no H tags. Google has confirmed this repeatedly in links I have posted elsewhere in this forum.