For Shopify merchants who haven’t checked their heading structure — here’s what H1, H2, and H3 tags actually do for SEO and AI visibility, and the mistakes most stores are making right now.
Open any Shopify store and look at the very first line of text on the page. That line — the big one at the top — is supposed to be an H1 tag: the single most important signal on the page telling Google and AI engines what it’s about.
We review a lot of stores. Almost all of them have a logo where the H1 should be. No text. No keywords. Just an image file Google can’t read.
That’s not a minor SEO oversight. It’s the equivalent of printing 10,000 flyers and leaving the headline blank.
- Logo image in the H1 position — Google reads nothing
- H2s are generic labels: “Join Us,” “Reviews”
- AI engines skip the page — no clear topic signal
- One keyword-rich H1 per page — topic confirmed
- Descriptive H2s that carry keyword value
- Clear heading hierarchy AI engines can extract and cite
What headings are — and why they’re not just “big text”
A heading tag is a piece of HTML that tells browsers and search engines how to read the structure of your page. H1 is the main heading. H2s are the major sections. H3s break those sections into sub-points.
Think of it like a newspaper. The H1 is the front-page headline. The H2s are the section titles inside — “Sports,” “Business,” “Local News.” The H3s are the smaller headlines within each section.
Google reads your page the same way. So does every AI engine — ChatGPT, Perplexity, Google AI Overviews. When someone asks one of those tools a question about Shopify SEO, the AI scans heading structure to understand what a page covers and whether it’s worth citing. A clear heading hierarchy means AI engines can pull answers from your page. A missing or vague one gets ignored.
Plug In SEO detects heading issues automatically. It flags pages with missing H1s, multiple H1s, and H2s with no keywords — so you know exactly where to fix.
Try Plug In SEO free →The mistakes most Shopify stores are making right now
Most merchants have never set a heading intentionally. They publish their store, the theme applies some default styling, and that’s the end of it. Here’s what the heading structure usually looks like:
The logo is the H1. The header area of the site contains an image of the logo — and the theme marks it as the H1. Google can’t read images. Your H1 is supposed to be the most descriptive piece of text on the page. Instead it’s a PNG with a file name like logo-v3-final.png and no alt text. Google gets nothing.
The brand name is the H1. A step up from the image, but still wrong for most pages. “Welcome to Bloom & Thread” tells Google nothing about what you sell. Your brand name isn’t a keyword anyone is searching for — unless you’re already famous. The H1 should describe what’s on the page in words your customers actually use.
The H2s are generic labels. “Join Us.” “Reviews.” “Visit the Store.” These aren’t section headings — they’re navigation labels. They carry no keyword value. They tell Google nothing about the content below them. Every H2 is keyword real estate. Most stores are using it to say “Contact Us.”
Missing or weak headings are one of the top Shopify SEO problems we see — and one of the fastest to fix once you know where to look.
Plug In SEO detects these issues automatically — flagging pages with missing H1s, multiple H1s, and H1s or H2s that contain no keywords. Plans start from $29.99/month. It can’t rewrite the headings for you (those are in your theme), but it tells you exactly which pages have problems and what’s wrong.
What a good H1 looks like
One H1 per page. That’s the rule. Multiple H1s send mixed signals to Google about what the page is primarily about — Plug In SEO flags this as an error.
The H1 should be 3–9 words, start with your target keyword, and describe what’s on the page clearly.
| Page | Bad H1 | Good H1 |
|---|---|---|
| Homepage | “Welcome” | “Handmade Leather Bags for Everyday Use” |
| Collection | “Our Products” | “Women’s Running Shoes — Shop All Styles” |
| Product | “Blue Linen Duvet” | “Stonewashed Linen Duvet Cover — King & Queen” |
| Blog post | “Tips and Tricks” | “How to Care for Linen Bedding Without Shrinking It” |
Quick test: cover your logo and remove all the images. Can someone read just the H1 and know exactly what the page sells? If not, rewrite it.
Google sometimes rewrites your meta title in search results to match what it thinks your page is about. It can’t rewrite your H1. Your H1 is your final say on the topic signal — make it count.
H2s and H3s: what you actually need
You need a strong H1 and descriptive H2s. That’s where most of your SEO value lives. H3s and H4s are useful for organizing long content, but fixing your H1 and H2s first gets you 90% of the benefit.
H2s are the major sections of your page. Each one should describe what the content below it covers — and include a relevant keyword where it fits naturally. Don’t force it. But don’t waste the line on “More Info” either.
Bad H2 → “About Our Products”
Better H2 → “Why Merino Wool Is Better for Sensitive Skin”
H3s are sub-points inside an H2 section. Use them when a section has multiple distinct parts. A product page probably doesn’t need H3s. A long blog post or buying guide usually does.
H4 and beyond — you almost certainly don’t need these. Most Shopify pages never use H4. If you’re writing content long enough to need four levels of heading, it probably needs to be split into separate articles.
Start with H1 and H2. Get those right first, then worry about the rest. If you want to audit your full store beyond headings, our Shopify SEO checklist covers every on-page and technical issue worth checking.
Frequently asked questions about Shopify headings
What is an H1 tag on a Shopify store?
It’s the main heading at the top of the page — the first thing Google reads to understand what you’re selling. Every page should have exactly one, and it should contain the main keyword for that page. Think of it as the headline for that page.
Does Shopify set H1 tags automatically?
Most themes apply the H1 tag to the page title. The problem is merchants often leave those titles as defaults — “Home,” “Collection,” “Products.” The tag exists; the keyword doesn’t. That’s the fix: update the page title to something descriptive.
Can I have more than one H1 on a Shopify page?
You can, but you shouldn’t. Multiple H1s confuse Google about what the page is primarily about. It’s usually a theme issue — a template that applies H1 styling to more than one element. Plug In SEO detects and flags it.
Do H2s affect SEO on Shopify?
Yes. H2s tell Google what sub-topics a page covers. They’re also what AI engines scan when deciding what to cite. A product page with keyword-relevant H2s (“Merino Wool Care Guide,” “How to Wash Without Shrinking”) signals more than a page with no structure. Don’t leave them blank or generic.
How do I check what headings my store is using?
Right-click any page and select “Inspect” or “View Page Source.” Search for <h1> in the source to see what Google is reading as your main heading. Or use Plug In SEO — it scans your whole store and lists every heading issue in one report.
Why can’t Plug In SEO fix my headings automatically?
Headings live inside your theme’s template files. Plug In SEO doesn’t touch theme files — that’s intentional, because editing templates incorrectly can break your store. What it does instead: tells you exactly which pages have the issue and what’s wrong, so you or a developer can fix it in the right place.
Audit your headings — find out which pages are sending Google the wrong signal
Plug In SEO scans your entire store and flags every page with a missing H1, duplicate H1, or keyword-free heading structure. It tells you exactly what to fix — so you can prioritise your highest-traffic pages first.
Audit your Shopify headings with Plug In SEO →