Web design is not the same as web development, but sometimes you’ll find a developer or designer with overlapping skills who can perform both. Many web designers create mock-ups of a site or app using graphic design software, while others create custom themes that can be viewed as functional websites. A website designer typically works with a variety of design software and technologies to create responsive layouts and page elements that are visually appealing to users. They’ll work to improve the interface and user experience, and often collaborate with graphic artists, programmers and copywriters along the way.
The words in the tag should be more than a description. They should provide a text equivalent of the image. In other words, the tag should include the same meaningful information that other users obtain by looking at the image. In the example of the mayor’s picture, adding an “alt” tag with the words “Photograph of Mayor Jane Smith” provides a meaningful description.