One way to do this to not make long web pages. Break them up logically into separate pages and use hyper links to connect to them. This will keep visitors to your site from having to wait for long page downloads. There is nothing worse than going to a site that has unreadable or multiple fonts. Think about images as telling a story, what doesn't support the story line should go.
Time is precious, large image files take a long time to download.
Also, resist using image files in place of text, with the exception of buttons. Many novices don't get hyper linked text, buttons never fail. META tags are text hidden in the page that carries the description of the page and keywords the page is indexed by. If you don't have them, the search engine will create a description and list of keywords to index your site by and select words it thinks are accurate, but often are not. An example is search engine pick up hidden button titles, etc.