Fix my Google Shopping product feed and improve product titles

Help me fix and optimize my Google Merchant Center product feed. Feed sample: [PASTE 10-30 ROWS: id, title, description, link, image_link, price, sale_price, availability, brand, gtin, mpn, google_product_category, product_type, condition, item_group_id, color, size, gender, age_group] Disapprovals and warnings: [PASTE FROM DIAGNOSTICS - e.g. "Mismatched value (price)", "Missing GTIN"] What I sell: [CATEGORY - my own brand or brands I resell] Shopping campaign problem: [e.g. "low impressions", "irrelevant search terms", "low click-through rate"] Do this: 1. Explain each disapproval in plain words, its likely cause (e.g. landing-page price or availability doesn't match the feed, sale price not live on the site), and the fix. 2. Check identifiers: GTINs present for branded products, and identifier_exists set correctly for custom or handmade goods. 3. Rewrite titles with a category-appropriate pattern (apparel: brand + gender + product type + material + color + size; electronics: brand + model + key spec). Put the terms shoppers search for first and stay within the character limit [CONFIRM]. 4. Map products to the most specific google_product_category, and suggest a product_type hierarchy plus custom labels (e.g. margin band, best sellers, seasonal, clearance) for campaign structure. 5. Flag policy risks in titles, descriptions, and images: promotional text, watermarks, unsupported claims. Return: - An issue table: issue, rows affected, cause, fix, priority. - Rewritten titles for my sample rows (old vs. new). - A checklist for keeping the feed and site in sync. Do not invent GTINs, specs, or attributes; mark missing values [ADD].