Express Entry is the primary pathway for skilled workers to immigrate to Canada. It is a system used by the Canadian government to manage applications for permanent residency under the following economic immigration programs:

1. Federal Skilled Worker Program (FSWP)
2. Federal Skilled Trades Program (FSTP)
3. Canadian Experience Class (CEC)

To be eligible for Express Entry, you need to meet the following requirements:

1. Language proficiency: You must take an approved language test (IELTS or CELPIP for English and TEF for French) and obtain a minimum score of Canadian Language Benchmark (CLB) 7 in all four language abilities (listening, speaking, reading, and writing) for FSWP and CEC, and CLB 5 for FSTP.
2. Education: You must have a Canadian secondary or post-secondary certificate, diploma or degree, or a foreign educational credential that is equivalent to a Canadian educational credential. You will need an Educational Credential Assessment (ECA) to prove that your foreign education is equivalent to a Canadian one.
3. Work experience: You must have at least one year of skilled work experience in NOC skill type 0, A, or B. The work experience must be gained in the last 10 years.
4. Age: You must be at least 18 years old and there is no maximum age limit.
5. Adaptability: You can earn additional points if you have a Canadian job offer, a provincial nomination, or have studied or worked in Canada.
6. Proof of funds: You must show that you have enough money to support yourself and your family members when you come to Canada.
7. Medical and security checks: You and your family members must pass a medical exam and a security check to be eligible for permanent residency.

Once you meet the requirements and create an Express Entry profile, you will be ranked against other candidates in the Express Entry pool based on a Comprehensive Ranking System (CRS) score. Candidates with the highest CRS scores will be invited to apply for permanent residency through regular Express Entry draws.