Çorum punches above its weight as a destination — not because the city itself is extraordinary, but because it sits at the centre of the densest concentration of Hittite remains in Turkey. Most visitors use it as a base for the archaeological sites, and that's entirely the right approach. The day trips to Hattusa, Yazılıkaya, and Alacahöyük are the main event, and the Archaeological Museum in town provides essential context before you go.
Within the city, the old quarter around the Ulu Cami and the bazaar is pleasant to walk through. The 13th-century Seljuk mosque is the oldest significant building in Çorum, and the adjacent covered bazaar still functions as a working market rather than a tourist trap. The Ottoman clock tower nearby marks the centre of the city and is a good orientation point. Neither sight demands more than an hour, but together they give the city a sense of historical depth beyond just being a gateway to Hittite country.
The Archaeological Museum deserves at least two hours, especially if you're planning to visit the Hittite sites. The finds from Hattusa, Alacahöyük, and Ortaköy-Şapinuva give you a grounding in what Hittite civilisation actually looked like — the cuneiform tablets, the bronze seals, and the Hüseyindede Vase in particular are worth studying before you stand in front of the originating sites. The museum is well-organised and not crowded.
Outside the main sights, Çorum is famous throughout Turkey for its roasted chickpeas (leblebi). Every shop in the bazaar sells them in different varieties — plain, spiced, coated — and buying a bag or two is part of the experience.