Insert the image above a section of text that you would like to wrap around it. Next, click on the image and click on either the 'Left' or 'Right' alignment buttons. Clicking left align will wrap the text around the image while keeping the image to the left, as seen below. Click writing align will do the opposite, placing the image to the right of the text.
Note: To keep the image from bumping up against the text, choose the option to add some blank space around the image when you insert it into the article.