To include images, you use the standalone image tag <IMG> or <IMAGE>. You need a source attribute, like in SRC="YourFile.gif", where YourFile.gif would be the name of your image file you want to include. Of course you can also use jpg-files and some other formats. If your picture file is not directly beside your HTML file in a common folder, you also have to include the path. An example here would be SRC="../OtherFolder/SubFolder/YourFile.jpg"
Other attributes you may want to use in image tags are alignment attributes (like in ALIGN="right" or something like WIDTH="200" to resize.)