无障碍
替代文本质量
为何重要
Alt text should describe what an image shows. File names like ‘IMG_1234.jpg’ say nothing, and very long alt texts overwhelm screen-reader users.
如何修复
- Describe the content or purpose of each image in under about 125 characters.
- Use alt="" for purely decorative images.
使用以下工具检查
- Image Alt Text Checker – Find images with missing alt text, missing dimensions and no lazy loading.
评分：通过的检查获得全部权重，警告获得一半，错误则不得分。 SEO 评分如何运作