Significant websites for UPSC current affairs include portals like Press Information Bureau (PIB), Rajya Sabha TV, and All India Radio. These platforms provide authentic updates on government policies, national events, and social issues, thereby ensuring candidates have access to credible information. Other useful resources include Insights on India, Vision IAS, and Forum IAS, which offer curated content and analysis specifically tailored for UPSC preparation. Regular engagement with these websites aids candidates in staying informed about current affairs trends crucial for their exams.