BeautyQueenzy yang bergerak di bidang skincare dan makeup dalam kegiatan promosinya belum mencapai target dan sasaran yang tepat. Penelitian ini bertujuan menerapkan algoritma Apriori untuk menganalisis pola pembelian produk guna menghasilkan rekomendasi strategi promosi berbasis data. Metode yang digunakan adalah Knowledge Discovery in Database (KDD) dengan 413 transaksi kategori skincare dan makeup, menggunakan minimum support 5% dan minimum confidence 20%. Hasil penelitian menghasilkan 91 aturan asosiasi valid dengan nilai lift ratio > 1. Aturan terkuat terdapat pada kombinasi produk Azarine (facial wash dan moisturizer terhadap serum) dengan nilai lift ratio sebesar 9,912. Sementara itu, kombinasi produk Glad2Glow (facial wash, serum, dan toner terhadap moisturizer) memiliki tingkat kepercayaan tertinggi dengan nilai confidence sebesar 95,65%. Berdasarkan hasil tersebut, diperoleh strategi promosi tambahan, bundling produk, dan cross selling. Penelitian ini diharapkan dapat membantu menentukan strategi promosi yang lebih tepat sasaran dan meningkatkan efektivitas penjualan.

BeautyQueenzy, a skincare and makeup brand, has not yet achieved its targeted promotional activities. This study aims to apply the Apriori algorithm to analyze product purchasing patterns to generate data-based promotional strategy recommendations. The method used is Knowledge Discovery in Database (KDD) with 413 transactions in the skincare and makeup category, using a minimum support of 5% and a minimum confidence of 20%. The results of the study produced 91 valid association rules with a lift ratio value of > 1. The strongest rule is found in the Azarine product combination (facial wash and moisturizer to serum) with a lift ratio value of 9.912. Meanwhile, the Glad2Glow product combination (facial wash, serum, and toner to moisturizer) has the highest level of confidence with a confidence value of 95.65%. Based on these results, additional promotional strategies, product bundling, and cross-selling are obtained. This study is expected to help determine more targeted promotional strategies and increase sales effectiveness.