Pauline Marol discusses strategies for small and medium enterprises (SMEs) to conduct conversion rate optimization (CRO) testing with limited resources. She recommends SMEs invest in training and focus on the voice of customers through customer service, NPS feedback, and sales data. SMEs should also focus on micro-conversions like pages per visit and exit pages. If full A/B testing is not possible, SMEs can use cheaper tools like heatmaps, session replays, and surveys, or conduct sequential testing. The key is developing testing skills while keeping the process light and focused on traffic sources, top pages, and radical changes based on customer homework.