There are four ways to add a person to a group simultaneously as you add them to TIC. The first is having them join up via keyword. This enters them into your TIC account and they join the group. The second way is to have them enter from your Digital Connection Card Link that you place on a tablet or computer and ask them to fill out their information. This creates their record and adds them to the group connected to that link. The third way is to import an existing list from a CSV file and select a group you want them to go into. This will allow you to quickly add exsisting people to a new group, but not duplicate their record. The forth way is to manually add a New Person and in the prompts to do that, you have the option to choose which group you add them to.
If the person record is already in your system but you simply want to add them to an additional group, you have two options to do that. Within the People tab you can see the list of people already in your account.
To add multiple people you can do this from the manage people tab or the group members tab.
If you only want to add one person to a group, you can just click on their profile and then hit the tiny plus symbol in the bottom right to add them to a group.