As the world continues to urbanize, sustainable urban development remains a critical focal point in global conversations. Goal 11 of the United Nations Sustainable Development Goals (SDGs) emphasizes the importance of making cities inclusive, safe, resilient, and sustainable. This goal, often dubbed 'Sustainable Cities and Communities', is rapidly gaining traction, shaped by innovative policy-making and strategic implementation around the globe.

The integration of smart technology into urban plans is at the forefront of achieving Goal 11. Cities like Amsterdam and Singapore have already adopted smart city frameworks, utilizing data and digital platforms to enhance urban living conditions. These frameworks not only improve public services but also significantly reduce environmental impacts by optimizing energy use and improving waste management.

On the policy front, international conferences focusing on sustainable urban development have underscored the role of local governments in achieving broader national and international objectives. For instance, the Istanbul Declaration on Human Settlements accentuates the importance of tailor-made local solutions, considering each city's unique cultural and socioeconomic contexts.

Key challenges persist, particularly in rapidly growing urban areas within developing countries. These include addressing housing shortages, improving transportation infrastructure, and providing adequate basic services to burgeoning populations. Despite these challenges, many cities are experimenting with innovative approaches to urban planning, including the development of eco-friendly public transportation systems and the revitalization of urban green spaces.

Community engagement remains crucial in driving these initiatives. Cities that have successfully implemented sustainable urban practices often highlight the importance of involving local communities in planning processes. By empowering citizens and ensuring their voices are heard, cities can foster a sense of ownership and accountability towards sustainable practices.

Looking forward, the next decade is expected to see an acceleration in the adoption of sustainable urban strategies, driven by technological advancement and greater international cooperation. These efforts are pivotal not only in enhancing urban living conditions but also in mitigating broader environmental and social issues such as climate change and inequality.