This is a handy introduction to a deep topic. Good work!
Regarding alt text: it's helpful to think about the context and purpose of the image you're adding alt text to. The alt should provide a text-based, alternative presentation of the meaning of the image, not necessarily a description of the content of the image.
Purely decorative images (e.g. within a button which also has a label) can often use alt="" because the meaning and context are provided by the label or surrounding content. Similarly banner and hero images often don't convey any meaning, so these can also have alt="". If the mood and tone of the page is set by the banner image, then go ahead and describe it.
Company logos typically link back to the home page, so alt="Back to home page" will probably help assistive tech users more than alt="Company Logo".
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This is a handy introduction to a deep topic. Good work!
Regarding alt text: it's helpful to think about the context and purpose of the image you're adding alt text to. The
altshould provide a text-based, alternative presentation of the meaning of the image, not necessarily a description of the content of the image.Purely decorative images (e.g. within a button which also has a label) can often use
alt=""because the meaning and context are provided by the label or surrounding content. Similarly banner and hero images often don't convey any meaning, so these can also havealt="". If the mood and tone of the page is set by the banner image, then go ahead and describe it.Company logos typically link back to the home page, so
alt="Back to home page"will probably help assistive tech users more thanalt="Company Logo".