It is good if you use 1 to 2 H1 tag for one page.

1 -2 H1 tags for each page.

Only one h1 tag we have to use, remain tags should become under h2 and h3 tags..

I think only one H1 tag is used in each page of website highlighting the main keyword.

only one H1 tag per post

We can use h1 tag once which will be mail heading of our body parts of webpage,
if you use multiple h1 tag Google only consider first H1 Tag used in body contents of webpage.

A default wordpress themes (Twenty Fifteen) has many H1 tags, but the Twenty Fifteen themes has a good SEO

Only one H1 tag per page be used. It is not recommended to use more than one as per Google Guidelines of SEO On Page.

Use only one H1 tag for a website.

I use only One H1 tag for my website's title.

You can have as many as you like but you should have only one on each page.

Good practice is using the H1 tag minimum once and maximum twice in a page. Excessive use of this tag will be considered as spam by the Google.

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Unless you are doing a one page website, it's recommended to only have one or two H1 tags in one page. One page website will need one H1 tag for each topic change (it can be called the substitute for pages for Google)

The latest version of HTML – the computer language that’s used to build pages on the web – enables developers to divide the page up into sections. And each section can have its own h1 tag (headline/heading). And Highlight the words.