H2K Infosys explains that when it comes to QA certifications, employers most commonly recognise the ISTQB (International Software Testing Qualifications Board) certification due to its global acceptance and industry-standard curriculum. ISTQB validates essential software testing knowledge, including test planning, execution, defect management, and quality assurance best practices. Many organisations consider it a benchmark credential for QA professionals seeking career advancement. Other respected certifications include Certified Agile Tester (CAT) and CSTE (Certified Software Tester), but ISTQB remains the most widely preferred by recruiters worldwide. Earning a recognised QA certification demonstrates professional competence, enhances credibility, and increases job opportunities in competitive software testing markets.