Vehicle parts have the lowest quality score of any industry
41.2 out of 100: no other segment in our benchmark scores lower than vehicle parts, and it's also the largest industry in the dataset. That's the finding from an analysis of roughly 298,000 products across four industries in the FeedOptimizer.AI database (August 2026), looking at which industry-specific title formula actually fits each segment: vehicle parts, golf equipment, apparel, and arts and crafts.
The title isn't the whole story. Vehicle parts titles average 67.1 out of 100 on the title component alone, mediocre but not disastrous. The total score still drops to 41.2 because the quality score is built from six components: title, description, attributes, product details, Google product category (GPC), and highlights. For vehicle parts, description scores only 55.5, and titles average 86 characters, the shortest of all four industries. A single "write better titles" fix won't move this number. The problem sits in the underlying data structure.
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Methodology: 298,000 products across four industries
This analysis covers the 15 largest Google product categories (GPC) in FeedOptimizer.AI's dataset, grouped into four industries by shared parent category. All figures are aggregated and anonymized. No individual store data is exposed.
| Metric | Value |
|---|---|
| Products analyzed | 297,914 |
| Industries covered | 4 (15 Google product categories) |
| Largest industry | Vehicle parts (199,637 products) |
| Smallest industry | Apparel (8,619 products) |
| Analysis period | through August 2026 |
Vehicle parts alone make up 67% of everything analyzed. That's not a skew we're smoothing over, it's the point: the largest industry in the dataset is also the weakest one. We've already looked at how much title length alone drives score, across industries, in our analysis of 324,000 product titles. This piece goes a step further and asks why the same title length pays off differently depending on the industry.
The gap between industries: 29.3 points
The best- and worst-scoring industries in our dataset sit 29.3 quality-score points apart, more than double the gap between title score and description score within vehicle parts (67.1 vs. 55.5, an 11.6-point gap). Which industry you sell in predicts more of your score than any single optimization tweak.
| Industry | Products | Avg. total score | Avg. title score | Avg. title length | Optimization rate |
|---|---|---|---|---|---|
| Arts & crafts | 60,449 | 70.5 | 98.9 | 134 chars | 98.1% |
| Apparel (shoes & clothing) | 8,619 | 67.3 | 91.3 | 123 chars | 80.3% |
| Golf equipment | 29,209 | 50.2 | 89.0 | 123 chars | 59.7% |
| Vehicle parts | 199,637 | 41.2 | 67.1 | 86 chars | 55.1% |
Key insight: According to FeedOptimizer.AI benchmark data from August 2026, arts and crafts sits at a 98.1% optimization rate, essentially fully covered. Vehicle parts sits at just 55.1%. That's not a coincidence. Arts and crafts titles are structurally simple: product name, material, color, quantity, easy to automate reliably. Vehicle parts need vehicle fitment, OEM numbers, and exact compatibility, attributes that many feeds simply don't maintain cleanly. The low optimization rate is itself a symptom of the problem, not a footnote to it.
Golf equipment sits at 50.2, closer to vehicle parts than to apparel, even though its title score (89.0) is almost on par with arts and crafts. Something other than the title is dragging the total down here too, more on that below.
The apparel paradox: more text, lower score
Inside "apparel," shoes and clothing sit 38.6 points apart, and shoes have the longer description. This is the sharpest single finding in the dataset: industry alone doesn't explain the variance, product type within the industry does.
| Category | Products | Avg. total score | Avg. title score | Avg. description length |
|---|---|---|---|---|
| Clothing | 4,234 | 86.9 | 93.6 | 620 chars |
| Shoes | 4,385 | 48.3 | 89.1 | 1,009 chars |
Shoes carry a 63% longer description than clothing (1,009 vs. 620 characters) and still score lower overall. Length isn't the lever here. More likely: shoes need precise attributes like size, width, and fit, correctly populated in the category or product details, while clothing's standard structure (size, color, material) is easier to detect automatically. Optimizing for title or description length alone misses the lever that actually matters for shoes.
Industry breakdown: the individual Google product categories
The four industries break down into 15 individual Google product categories. The table shows how much variance exists even inside a single industry.
| Google product category | Industry | Products | Avg. total score | Avg. title length |
|---|---|---|---|---|
| Golf (general) | Golf equipment | 1,682 | 77.3 | 134 chars |
| Art & crafting materials | Arts & crafts | 1,591 | 65.0 | 126 chars |
| Art brushes | Arts & crafts | 8,478 | 74.0 | 135 chars |
| Arts & crafts (general) | Arts & crafts | 5,542 | 72.0 | 136 chars |
| Art & craft paint | Arts & crafts | 15,908 | 70.6 | 136 chars |
| Hobbies & creative arts | Arts & crafts | 24,026 | 69.5 | 133 chars |
| Paint mediums | Arts & crafts | 2,933 | 69.6 | 134 chars |
| Painting canvas | Arts & crafts | 1,971 | 68.9 | 135 chars |
| Clothing | Apparel | 4,234 | 86.9 | 123 chars |
| Golf bags | Golf equipment | 3,950 | 55.2 | 126 chars |
| Golf balls | Golf equipment | 1,822 | 50.2 | 124 chars |
| Golf gloves | Golf equipment | 3,223 | 47.5 | 127 chars |
| Golf clubs | Golf equipment | 18,532 | 47.2 | 121 chars |
| Shoes | Apparel | 4,385 | 48.3 | 123 chars |
| Vehicle parts | Vehicle parts | 199,637 | 41.2 | 86 chars |
The generic "golf (general)" bucket scores best at 77.3, while the specific equipment categories (golf clubs, golf gloves) sit at 47 to 48. Arts and crafts shows no such pattern: all seven of its categories cluster within nine points of each other (65.0 to 74.0). Golf equipment clearly needs a different approach per product type. Arts and crafts doesn't.
Title formulas that fit the industry
There's no universal title formula, because different industries have different purchase-decision attributes. We've already written up the baseline formula and generic industry examples in our guide to optimizing Google Shopping product titles. Here's the formula per segment covered in this dataset, informed by our data plus established industry practice:
Vehicle parts: Brand + vehicle compatibility + part type + OEM/manufacturer number. Example: "Bosch Front Brake Pads for VW Golf 7 2013-2020, OEM# 1K0698151." Per Fullmoon Digital's guide for auto parts retailers, GTIN, MPN, product_type, and Google product category are among the most important supplemental attributes here. In our data, these are exactly the fields many vehicle parts feeds leave incomplete, which lines up with our 55.5 description score.
Golf equipment: Brand + model + club/equipment type + core attribute (shaft flex, handicap range, size). The spread between 47.2 (golf clubs) and 77.3 (generic) suggests many golf titles are still missing the model name or the core spec attribute.
Apparel: Brand + gender + material/attribute + product type + color + size for clothing. For shoes, add size, width, and fit as required attributes, because our data shows that's where the real score lever sits, not text length.
Arts & crafts: Product type + material + quantity/size + color. This industry's 98.9 average title score already shows what a working formula looks like: short, structured, no unnecessary padding.
What this means for your store
- Check the description before you touch the title. For vehicle parts (55.5) and apparel, description is the weaker lever, not title. A title-only fix barely moves the total score.
- Benchmark against your specific sub-category, not the industry. 38.6 points separate shoes from clothing. Compare your numbers against the most specific Google product category that matches your catalog, not the broad industry label.
- If your optimization rate is low, fix data quality first. Vehicle parts sits at 55.1% optimized, far below arts and crafts at 98.1%. Missing vehicle or fitment data often blocks optimization itself, not just the resulting score.
How FeedOptimizer.AI optimizes by industry
A golf glove formula doesn't work for a brake pad, and a shoe formula doesn't work for a paintbrush. FeedOptimizer.AI detects each product's category and adapts title structure, attribute selection, and description accordingly, instead of applying one formula across the whole feed. That matters most exactly where our data shows the biggest gap between title score and total score, vehicle parts and golf equipment: the AI fills in missing attributes from the available feed data instead of silently leaving them blank. Optimized titles land in a supplemental feed in Merchant Center, your original feed stays untouched. Pricing scales with product count, not industry.
Frequently Asked Questions
Which industry has the lowest Google Shopping quality score?
Per our August 2026 analysis, vehicle parts score lowest of the four industries studied, at 41.2 out of 100. Title score sits at 67.1, description at just 55.5. The gap comes mostly from missing attributes like vehicle compatibility and OEM numbers.
Why do vehicle parts perform so poorly on Google Shopping?
Vehicle parts titles average just 86 characters, the shortest of all four industries, and only 55.1% of products are optimized at all. The most common cause: vehicle compatibility, OEM numbers, and exact fitment data are missing from many feeds, which blocks optimization itself, not just the finished title.
Do all industries need the same title formula?
No. Our data shows arts and crafts clustering within just nine points across sub-categories, while golf equipment spans 30 points between golf clubs (47.2) and the generic golf category (77.3). Every industry needs its own formula, and sometimes every sub-category within an industry needs its own too.
Why do shoes score lower than clothing if their description is longer?
Shoes carry a 63% longer description than clothing (1,009 vs. 620 characters) yet score 38.6 points lower overall. Description length isn't the deciding factor for shoes. Precise attributes like size, width, and fit are the more likely missing piece.
What does the quality score measure beyond the title?
The quality score combines six components: title, description, attributes, product details, Google product category, and highlights. A strong title score doesn't guarantee a strong total score, as golf equipment shows (title 89.0, total just 50.2).
