When creating a Google Slides presentation, it is always a good idea (and sometimes legally required) to make it as accessible as possible. There are several ways to do this, including: using tables, working with high contrast colors, using informative link text, using numbered and bulleted lists, incorporating slide numbers, and using automatic captions. For more information about these things, visit Google's "Make your document or presentation more accessible" page.
Alternative text is used by a screen reader to describe an image to a user who may have a visual impariment. Without alternative text, a screen reader would simply read, "image" when encountering a graphic. Alternative text will help users know what the image is and how it fits in the text and should be added for images, photos, drawings, and other types of images.
In this lesson, we will see how to add alternative text to the image of the Sample Gates.