If you are looking for a certain words on website, bur there's too much text to find it in a reasonable time, you can use a handy find function built in Google Chrome browser.
Microsoft Word allows you to add the comments to text, images or basically anything included in the document. It's a great way do review a document and suggest the changes that should be made.
As from November 11th Google will launch a so called Shared Endorsements for products or services which will allow them to use your picture when displaying ads to your friends.