The title block is the metadata zone of a drawing. It says what the drawing is, who it's for, when it was issued, what scale it's at, and which revision is current. Standard fields per ISO 7200 include drawing title, drawing number, originating company, sheet size, scale, revision, date, and signatures.
On the workshop floor, the title block is how anyone confirms they're cutting the right gate. Every PDF page in a drawing pack carries the same title block so individual sheets can't get separated and turn anonymous.
CAD60 lets you set client name, job number, contact, date, and revision per drawing pack. The Fabricator and Fleet tiers also let you upload a logo, so the title block is co-branded with your business.