It's recommended to update your promotional materials regularly, ideally at least monthly or whenever new promotions or games are released. Regularly refreshing your content can:
1. Keep your marketing efforts relevant and engaging
2. Showcase the latest casino offerings and bonuses
3. Improve click-through rates and conversions
4. Demonstrate to potential players that you're providing up-to-date information
A/B testing different banners and landing pages can help you optimize conversion rates over time.