Keywords
Publications will expect you to provide metadata that indexes your text. To put this in everyday words, metadata will help readers find your paper in a database or through an online search engine. Amongst this metadata are keywords that are placed at the start of your text, directly underneath the abstract.
Aside from their value as search aids, keywords are very useful in and of themselves when it comes to finding a focus to your subject matter, establishing its boundaries. They do not necessarily have to be about the subject matter itself (although it is a very good idea to make sure that at least a few of them do have a direct relation to the subject); they can also relate to an overall area, or a concept: So, when it comes to keywords, global terms such as "architecture," or "typography," or "space," or "memory" are perfectly acceptable. You should also be aware that your own name cannot be amongst the keywords since that is a separate category of metadata that gets its own search field in the database under "author name."
Usually a publication will limit the number of keywords to a number between 5 to 8. So, be careful whilst you choose and make sure that you are giving words that will help the search engine. Therefore, the thing to do is to ask yourself "what search terms/or combinations of search terms would I use to find my own paper?"