In an online community, a "bot" is a fake account under the control of the admins. The bots play a vital role in our internet ecosystem, although not all bots are bad. However why we need a bot?
To have a successful and engaging community, you as an admin should be very active and engaged in the first place. You need to interact with the members of the community to encourage them as well. But what if the number of admins and early users is not enough for creating an engaging community?
In this case, fake it till you make it.
What you need is a couple of fake accounts. This way, you will be able to act as real members and to build the interacting environment of your community. You can ask and answer questions, create tons of contents, up-vote others' answers, welcome and follow new members, and many more, all by using your bots. When members see the great interaction in your community, they are more likely to engage and to advocate your community to their friends.
This is a simple yet powerful way to build an alive and engaging community of yours. In tribe, we have bots ready to use. Admins are able to add these bot in their community to improve the engagement.