While screen readers and speech recognition software can read an entire page to a user, many people prefer to listen to a list of links. This is especially true on landing pages, where much of the content is a jumping-off point to other pages.
For this reason, it's important that link text is descriptive and useful. For example, link text that says "More" might seem fine when surrounded by relevant text, such as "Click here to learn more about alt text." But the screen reader only reads "learn more." Imagine a page full of nothing but "more" and "click here." It's like asking the user to go through unmarked doors until they find the one they want.
A better link would be "Learn more about alt text." Even better would be "Learn more about alternative text for images."
Keep in mind, too, that screen readers interpret all-caps words in a certain way. The link text "MORE" would be read aloud as "em oh are ee."
The same is true for URLs. Whenever possible, use descriptive words for the link instead of the URL. Internet addresses would be read aloud as "aitch tee tee pee ess colon slash slash..." You get the picture.