This happens over a (long) period of time. If the lyrics are suited to the Mudcat (i.e. Folk/Blues) then the use of LYR ADD (lyrics Add) in the title line brings them to the attention of some of the helpers at Mudcat, who 'harvest' them for eventual inclusion in the DT. The time involved also allows for corrections, and (hopefully) the inclusion of a tune file and any necessary notes. A guide to the standard layout for posting songs can be found in the FAQ

Nigel