A more thorough explanation:

Posting

A message or piece of content that is published or shared on a website or social media platform.

• She posted a photo of her new puppy on Instagram.
• He wrote a blog post about his experience traveling to Japan.
• They posted a job listing on their company's website.

These examples illustrate how posting refers to sharing content online. Whether it's a photo, a blog post, or a job listing, posting involves publishing something for others to see on a website or social media platform.