In the era of globalization, diplomatic relations play a very important role in shaping a country’s foreign policy. Diplomacy does not only consist of formalities, but includes complex interactions between countries, international organizations, and various non-state actors. Strong diplomatic relations can increase cooperation in various fields, including economic, security and socio-cultural. One of the main components of diplomatic relations is multilateral diplomacy. In the era of globalization, countries often participate in international forums, such as the United Nations (UN), to deal with global issues. Multilateral diplomacy allows countries to collaborate in facing common challenges, such as climate change and the global health crisis. For example, the use of the Paris agreement to reduce greenhouse gas emissions shows the importance of international cooperation in addressing environmental problems. Apart from that, diplomatic relations also involve close bilateral interactions. Countries establish mutually beneficial trade, security and cultural agreements. For example, free trade agreements can open new markets, increase investment, and facilitate economic growth. In the Indonesian context, relations with countries such as the United States and China are becoming increasingly important to ensure a strategic position in Southeast Asia. Globalization also has an impact on soft power, namely the ability of a country to influence other countries through culture, values and policies. Through cultural diplomacy, countries can promote their arts, education and values to create a positive image. For example, student exchange programs and international cultural festivals contribute to increased understanding between nations. Information technology also influences the way countries communicate and negotiate. In the digital era, the use of social media and online platforms has become an important tool for public diplomacy. Countries can directly interact with communities abroad, building closer relationships. However, this also presents new challenges, such as the spread of false information that can damage the country’s reputation. National resilience is another very crucial aspect in diplomatic relations. Countries need to manage their foreign relations to protect national interests. In the context of globalization, threats such as terrorism, human trafficking and cyber attacks demand stronger international cooperation. Security diplomacy, including military cooperation agreements, is fundamental to creating regional stability. In terms of economic policy, diplomatic relations also play a role in the creation of economic areas. An example is ASEAN, which promotes economic integration in Southeast Asia. This collaboration brings benefits in the form of increased trade and investment between member countries. On the other hand, economic competition between countries requires smart diplomatic strategies to avoid conflict. Climate change and global environmental issues have also given rise to new international cooperation. Countries must discuss collective solutions for the sustainability of the planet. Environmental diplomacy, such as COP talks, is an important arena for reaching concrete and effective agreements. Geopolitical tensions are also changing the face of diplomatic relations. Great power rivalries and regional conflicts often trigger more aggressive diplomatic action. For this reason, countries must have the ability to adapt quickly to maintain stability and security. Along with the rapid changes in the global arena, effective and responsive diplomatic relations are very necessary to create a safe, prosperous and just world. Global society requires cross-country collaboration to overcome the complex challenges it faces, making diplomacy the main tool in navigating the era of globalization.