Image Block: Improve "Alt text" attribute description. #30872
Description
What problem does this address?
The sidebar option "Alt text" asks the user to describe the purpose of the image or to leave it empty, which can result in users not knowing the importance of the alternative text to leave it empty.
What is your proposed solution?
As proposed during the FSE Go/No-go demo on April 14th, the description should better explain why an alternative text is recommended in terms of accessibility and SEO.