Hi,
How many H1 tags can one take on a single web page? Does it even matter?
Yes H1 tag matters as it defines the main heading of your webpage. It helps to build your content heading and helps search engines know about it for ranking webpage content in SERPs.
You can use how many you want but it should be meaningful.
Only one time you can use the h1 tag.
H1 tag is always main heading tag when google crawl your website so google will your main heading.
Header tag is one of the main factor in on page SEO:
We should use <h1> tag only once per page and we should tend to use all the header tags <h1> to <h6> only one per page.