Selecting keywords for a scientific paper is often difficult, and it’s important to get the keywords right so readers can find your work.
The Medical Subject Headings section of the U.S. National Library of Science are responsible for the MeSH Library of approved keywords. They have recently launched a simple tool to help pick appropriate keywords. You can simply paste your abstract or other text into the webpage, and the MeSH on Demand tool will provide a list of suitable keywords.
In the image below, I used the abstract from one of my own publications to show how simple and useful the MeSH on Demand tool is.