Item Group Title [item_group_title] Field for Product Feed

Optional but Recommended for Variant Grouping in ChatGPT

The item_group_title attribute defines a common title for a group of related product variants (for example, the same model available in different sizes or colors).
It helps ChatGPT and other platforms display products in unified collections and improves the clarity of product families in search results.

When to use

Use this field when you have multiple variants of the same base product such as different colors, materials, or sizes.
This field complements [item_group_id] by adding a human-readable title to the group.

• [item_group_title] should:
  • Use the same text across all variants of a given group
  • Clearly describe the shared product model or collection
  • Be limited to 150 characters or fewer
  • Avoid ALL CAPS or promotional text

Format

• Type: String (UTF-8 text)
• Character limit: 150
• Repeated field: No
• Schema.org property: Product.isVariantOf

Examples:

Relationship with item_group_id

While [item_group_id] (see SharpFeed’s documentation) is a technical identifier used to group products by ID, mostly used by Google [item_group_title] provides a descriptive, user-facing label for that same group.

• Use both when possible: they complement each other.
• Avoid using product titles or variant names as the group title.
• Never use the same value for [item_group_title] and [title] unless all variants are identical in naming.

Minimum requirements

Note: This attribute is optional but strongly recommended when variants exist.

• Keep titles under 150 characters.
• Use consistent naming across all variants.
• Ensure readability (avoid internal codes or abbreviations).
• Don’t use all caps or promotional phrases (“SALE”, “NEW”, etc.).
• Don’t use unique titles for each variant — this field represents the group.

SEO / AI Tip

Grouping variants with a clear, consistent item_group_title improves structured listings and enhances how ChatGPT presents product families.
It can also increase conversion by helping users explore alternative colors or sizes in one place.

Official Source: ChatGPT Product Feed Specs