You can use tribe App Store to install the sign-up wall on your community. Having sign-up wall installed means that while the content is being indexed by Google, visitors would need to sign-up to be able to see the content fully.
Therefore, when you publish interesting content on your community, people would not just read it and leave. They will need to sign-up into your community to read the content.
You can easily install Sign-Up Wall, or other apps available, on your tribe community. It it just a few clicks away. Please click on the link below to learn how you can install an app: