Kompong Thom is the capital of Kampong Thom Province in Cambodia. It's situated about half-way between Phnom Penh and Siem Reap and thus most travellers will only rush through on there transfer between these to major attractions.
Nevertheless it is a pleasant and relaxed place and a good starting point for exploring the countryside and the temples of Sambor Prei Kuk.
(http://wikitravel.org/en/Kompong_Thom)