How to Add a Web Image to Your WordPress.com Posts
Adding an image or photo to your WordPress blog post is easy. Start by clicking the Add Media button, which is the first button on the Upload/Insert toolbar. The Add Media window opens, letting you choose images from your hard drive or from the web.
To add an image from the web after you click the Add Media button, follow these steps:
Click the From URL tab.
Type the URL (Internet address) of the image in the Image URL text box.
Type the full URL, including the http and www portion of the address. You can find the URL of any image on the web by right-clicking it and selecting Properties.
Type a title for the image in the Image Title box.
Give the image a title so you can easily identify the image later when using the Media Library. A title also assists in search engine optimization because WordPress inserts a <title> tag in the HTML markup that looks like this: title="your image title here", which helps search engines identify the type of content on your page.
(Optional) Type a description of the image in the Alternate Text box.
The Alternate Text, also referred to as the ALT tag, is shown only if a browser is unable to show the image itself. It provides a text description of the image; additionally, search engines read ALT tags easily, which helps them categorize your site in their search engine directory.
(Optional) Type a description of the image in the Image Caption box.
The caption displays underneath the images on your blog after your post is published.
Choose your alignment option by selecting the None, Left, Center, or Right radio button.
Type a link or choose not to link the image:
None: Choose this option if you don’t want to link the image to anything.
Link to Image: Choose this option if you want to link the image to its individual URL, or you can type any URL to link an image to another website or page.
Click the Insert into Post button.