What is the Pagination library in CodeIgniter 4?

CodeIgniter 4 includes a built-in Pager class for pagination. In a model, use paginate() directly: $users = $this->userModel->paginate(15) — this returns the current page's data. Get the pager: $pager = $this->userModel->pager. In the view: <?= $pager->links() ?> renders navigation links. The current page is automatically read from the page query parameter in the URL. Customize templates in app/Views/Pager/. For non-model pagination (manual queries): $pager = service("pager"); $pager->makeLinks($currentPage, $perPage, $total). CI4's Pager generates clean Bootstrap-compatible pagination HTML and supports multiple pager groups per page for paginating multiple datasets simultaneously.