Once your form has been tested successfully put links to it on your principal pages. This is particularly useful for searching on a large set of carefully organised files. Any number of keywords may be used, though indexing will become progressively slower as more are added. The names of the keywords to be used in the index must be given in the MetaNames command in the configuration file. A different CGI script is used with search forms using keywords.
Further guidance is given in comments embedded in the example.