The label for prospective content in a text area is called placeholder text. It's usually encountered when there's a prompt to fill out a form. It's the suggestion that informs you to input your last name or the manner in which to submit your birthdate or phone number. Placeholder text is commonly used as a cue to fill in actual content.
Placeholder text is useful when you want to give users some guidance about what they should type into a field but don't want them to see the actual input box. For example, if you are building a search form where users can enter keywords for their search request, you could use placeholders to indicate the purpose of each field. A user would know that the first keyword field is for entering a word and the second one is for entering a phrase. Without placeholders, the user might not realize this. With placeholders, she knows that she should enter words, not phrases, into the form.
Placeholder text is most commonly found on forms but it also appears in other contexts such as comments sections, search boxes, and drop-down menus. Placeholder text is useful because it gives users some indication of what will happen if they do nothing. If a user doesn't enter anything into a field, then the default value is used instead. For example, if a user leaves a comment but doesn't enter any text, then a placeholder comment is left instead.
Placing text, often known as dummy text or filler text, is text that temporarily "holds a place" in a page for the purposes of typesetting and layout. The person doing the placing may also call it "filling."
The word "holder" is used because this text will hold the space until something else can be put there. Usually this means that the word "whoever" will go here until another sentence can be typed.
Holder text can be used in many situations where you need to fill a space with text but don't want to actually type it. This includes when you are writing a letter or email, when you are making notes by hand, and when you are creating graphics for websites or presentations.
There are two main ways to insert placeholder text: using plain text files and using programmable text tools. Plain text files are simply groups of words and lines separated by blank spaces or newlines. These can be simple text documents stored in a folder, or they can be part of a larger document such as a book or website. Programmable text tools are programs that allow you to create and modify placeholder text easily.
Placeholder text is sometimes known as fake text or filler content. It is a letter, phrase, or string of characters that serves as a placeholder for the final contents. In the screenshot below, "email" or "phone" are placeholders. The actual content will be typed in later.
Placeholders are useful when you want to give your readers a sense of what will happen next in your story or article but don't know exactly what it will be yet.
In Microsoft Word, placeholders appear as small squares with the typing tool above them. You can type into these squares and they will change to display your actual content soon after. Placeholders are particularly useful when you need to include some suggestive words or phrases in an article or report that you aren't able to predict completely ahead of time.
For example, if you're writing about a famous person and don't know how they would react to being called "Mr. So-and-So," you could use placeholders to describe what he or she might say: "The man/woman we'll be talking about here likes to be called by his/her first name", "We'll be referring to this person as 'he' because we don't know their gender.", etc.
You can also use placeholders when you don't want to reveal future plot twists or major scenes in a novel.