Hi there Olvia,
First off, welcome! It's always exciting to see some new faces here :)
In regards to the H1 tag, if I've understood you correctly, you'd be looking for the Homepage Title and Meta Description?
If so, click Online Store > Preferences and you'll find it there!
If I misunderstood, and you meant that you wanted to change the actual h1 heading, that would be found in your theme files.
For debut, if you go to Online Store > Actions > Edit Code, then continue to your Assets folder. In that folder you'll find the theme.scss.liquid which you'll see defines all the headers.
If I've completely missed the mark, please let me know! I'd be happy to revisit and get you on the right track.
Since you noted you were new, I'd love to share a couple of helpful resources!
50 Ways To Make Your First Sale | This comprehensive guide will teach you everything you need to know about making your first ecommerce sale.
The Essential Shopify Store Launch Checklist | Instead of running around aimlessly, entertaining every frantic thought, take a methodical approach to your launch. Ease your mind and stay organized with this handy Shopify store launch checklist.
If you have any questions, let me know!
I'm happy to help,
Customer Service Guru | 24/7 Support
Thank you for your great support. Surely, I am happy to revieve your prompt reply. Actually I want to change my home page Header1. Unfortunately, the keyword I inserted once, is not the best keyword for my homepage. So I would like to replace a new focusing keyword insted.
Or would you please assist me leting know that is there any negetive effect if I push the new keyword as 2nd one in H1 for my home page? And how?
Thank again for your cordial support.