Description:

Autocomplete an input field to enable users quickly finding and
selecting some value, leveraging searching and filtering.

By giving an autocompleted field focus or entering something into it,
the plugin starts searching for matching entries and displays a list
of values to choose from. By entering more characters, the user can
filter down the list to better matches.

This can be used to enter previous selected values, eg. for tags, to
complete an address, eg. enter a city name and get the zip code, or
maybe enter email addresses from an addressbook.