You will usually be asked to complete skills based tests online, as an early stage of the selection process for a job. These are generally designed to assess your competency in widely-used office software packages such as MS Word and Excel.
During the test you will be required to perform tasks in these programs using whichever methods you usually would, including keyboard shortcuts. Excel tests are likely to include questions on functions, charts & graphs. Word tests are designed to assess your ability to format documents using the program’s functions.
Once you’ve completed these tests, the employer or recruiter will have an understanding of your skill level for each of the programs, which is usually classed as either Basic, Intermediate or Advanced.