Why SEO Checker tools can still see hidden Header tags?

EuchG Member Posts: 7
edited June 2022 in Ask a Question

Hello guys, please try it yourself..

So if you hid H2 or any content on your homepage, then publish, then run your website using this https://www.seoptimer.com/ or any SEO checker tools.

The tool can still see your hidden content and marking them as duplicated.

Any ideas? or is this an existing issue?