Collators assist the validators in consensus by constructing the parachain blocks. Collators keep a full node for a particular Parachain and a full node in the Relay chain. To be a Parachain comprehensive node, they keep all important information, like transaction information, signatures, and condition transitions, to assemble parachain blocks. https://polkadot-bars-official-in38258.rimmablog.com/28119157/manual-article-review-is-required-for-this-article