If your business does anything online, web content filtering is critical. Underpinned by policy, business must define acceptable content and use then implement an enforcement solution. Always keep your legal team involved. Be sure to select a scalable and highly available solution for your environment when considering cloud, on premise, hosted, or hybrid options. Consider dedicated solutions to supplement your security appliances. Be wary of inspecting encrypted traffic. Good reporting and alerting capabilities are a must. Managed Security Services are worth their weight in gold. Use change control for modifications. Balance functionality with security, using a defence in depth strategy.