Answer: The easiest way to directly add a H1 tag to the Home page template is to use the Custom HTML section.
Please use the steps below for guidance, but please be aware we are unable to provide one-to-one support for this task because it involves theme customization.
Step 1: Within your Shopify admin section, go to Online Store.
Step 2: Under Themes, locate your theme and select Customize.
Step 3: On the left-side section menu, click Add section then add a Custom HTML section. (Ensure you are viewing your home page template.)
Step 4: Select the Custom HTML block and enter your H1 tag.
Step 5: Save your changes.
Adding H1 tags
Here are two methods to help you add H1 tags.
Method 1: Edit the pre-populated html code
Editing the pre-populated code in the HTML box will ensure the theme's styling is maintained. Simply change the <h2> tags to <h1> and replace the text as shown below.
Method 2: Remove the default HTML text and add a clean code
If you have experience with HTML then you can remove the pre-populated code and enter your own that you can style yourself.
Add the following code into the HTML box and alter the text between the two tags, as shown below.
<h1>Your own custom h1, including any important keywords</h1>