There are many ways you can show information on your website, but by far one of the most popular interactive methods is to have text appear when you rollover an image. Here you can see two quick tutorial videos showing you how to build out different text on hover states.
Keep in mind that the amount of copy that shows on hover can greatly affect your design. If you have too much, it can get cut off or stretch out its parent container, depending on how you built the interaction.
Having Text Show on Hover
Having Text Roll Up on Hover