60-second video here: How to Embed a Visualization in a Web Page.
1.) Navigate to the chart or map that you would like to embed.
2.) While on the chart, click the share icon to view the embed options.
3.) This will open up a window that contains all the information you need to embed your dataset. You will be given two code options: iFrame and JS. You can simply choose your code option and size and this will automatically generate your code.
4.) Now that you have your embed code, you can add your visualization directly into your webpage!