The documents are drawn primarily from a collection of 2.4 million rolls of microfilm containing photographic images of historical documents from 110 countries and principalities. The documents include census records, birth and death certificates, marriage licenses, military and property records, and other vital records maintained by local, state, and national governments.
Those wishing to volunteer, can go to the "Indexing" section on the FamilySearch header and then click "Web Indexing" on the dropdown menu. When the page loads, indexing can be done by clicking the "Find Batches" button. Instruction for each record type will be given after a collection to index has been picked. The data submitted through these indexing projects is eventually made public and will be available at Introduction to Family History Centers or at the FamilySearch website for use in genealogical and family history research.