A guestbook is a page or feature on a website that allows visitors to leave messages. It appears as one of the characteristic elements of early internet sites, alongside self-introductions, hobbies, diary-like notes, and link collections. It served as a place where visitors could write comments, greetings, or traces of their visit, creating a simple form of interaction between the site owner and the audience.
The guestbook belongs within the culture of early web browsing, when users moved from link to link like explorers searching for the next unfamiliar site. In that setting, a guestbook was more than a comment box: it functioned as a record of visits and a small social space embedded in personal websites. It helped make the web feel participatory, even when the interaction was minimal and asynchronous.
It can be defined primarily as an early-web communication feature and a marker of personal website culture.