Is Meteora open to the public?

Excuse me, could you please clarify whether Meteora is accessible to the general public? I'm quite intrigued by the place and would love to visit if it's open to tourists. Are there any restrictions or special permissions required for a visit? Additionally, could you provide any insights into the best time of the year to visit Meteora, considering its unique location and any potential seasonal considerations? Thank you in advance for your assistance.