Shopee and Lazada account for a dominant share of Singapore e-commerce GMV, but most sellers on these platforms are playing defence — reactive to algorithm changes, competing on price, and watching margins erode. This guide covers the marketplace optimisation playbook: how the algorithm actually works, what levers drive ranking and conversion, and how to build a sustainable marketplace business without racing to the bottom on price.
How the Shopee and Lazada Algorithms Work
Both platforms use a conversion-weighted ranking algorithm: listings that generate more purchases per impression rank higher, which generates more impressions, which generates more purchases. The inputs that most directly influence ranking: conversion rate (CVR) of the listing; review velocity and average rating; shop health score (response rate, fulfilment rate, dispute rate); and paid ad spend (listings with active Shopee Ads or Lazada Sponsored Products get boosted visibility). Implication: a listing with a 3% CVR and 500 reviews will outrank a listing with 1% CVR and 10 reviews even if the latter product is objectively better.
The 6 Optimisation Levers
1. Listing Optimisation
Title: include primary keyword + key benefit + product variant. The first 60 characters of your title are most algorithmically weighted. Main image: white background, full product view, no text overlay (platform guidelines). Secondary images: lifestyle context, dimension drawing, feature callouts, comparison vs. competitor. Description: structured, keyword-rich, mobile-optimised (most browsing on Shopee/Lazada is mobile). A/B test your main image — this single variable has the largest impact on CTR from search results.
2. Review Velocity Management
Reviews are the single highest-leverage ranking and conversion factor. Tactics: post-purchase automated message requesting review (platform-native; 24–48 hours after confirmed delivery); include a card in packaging with a QR code linking to your shop review page; for high-value products, personal follow-up message from the shop owner. Target: 10+ reviews in the first 30 days of a new listing. Without this base, the algorithm will not index the listing in competitive category searches.
3. Pricing Architecture
Platform algorithms reward price competitiveness but do not require you to be cheapest. Set a “reference price” (cross-out price) that is your RRP, and a “sale price” that is your operational price. This creates a permanent perception of discount without cutting actual margin. Use flash sale slots (Shopee Flash Sale, Lazada Daily Deals) for volume spikes at thin margin — the review and sales velocity from flash sales feeds the algorithm long after the promotion ends.
4. Shop Health Score
Maintain: chat response rate above 90% (within 12 hours); fulfilment rate above 98% (ship within the stated lead time); dispute and return rate below 1%. These metrics directly affect your shop tier (Preferred Seller, Mall status) which unlocks algorithmic boosts, platform-funded vouchers, and search badge placement. A single week of poor shop health scores can take 4–6 weeks to recover from in ranking position.
5. Paid Advertising
Shopee Ads (Search Ads and Discovery Ads) and Lazada Sponsored Products operate on a cost-per-click auction. The ROI framework: calculate your acceptable CPC as (average order value × gross margin % × target ROAS − 1) ÷ CVR. For a product with SGD $80 AOV, 45% gross margin, and 3% CVR, the maximum viable CPC is approximately SGD $1.08. Bid above this and you are buying sales below contribution margin. Start ads only after your listing has 10+ reviews — ads on low-review listings convert poorly and waste budget.
6. Bundle and Cross-Sell Architecture
Marketplace algorithms reward high AOV (through “frequently bought together” signals) and low return rates (through bundles that satisfy the complete purchase need). Build 2–3 bundles per hero product: a value bundle (core product + low-cost accessory), a premium bundle (core product + high-margin add-on), and a refill or subscription bundle if applicable. Bundles are harder to price-compare and typically carry 10–15% better margins than individual SKU sales.
The 6DOF Product Marketing Consulting service includes marketplace channel strategy and listing optimisation as part of GTM engagements. Related: Multi-Channel Pricing Strategy →
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