A new ecommerce brand can build a working Meta ads foundation in 90 days by sequencing three phases: audience and creative setup in month one, structured campaign launches in month two, and budget scaling with retargeting in month three. This guide walks through each phase with the specific setup steps, targeting options, and optimization checkpoints that matter at each stage in 2026. Starting a new ecommerce business is exciting but unforgiving — you generally get one real s