Manually adding a candidate into your Teamtailor account is called Sourcing.
If you want to add a candidate to a specific job, go to that job and then click + Add candidate.
To add a candidate profile to the candidate pool simply go to Candidates. Up to the right you will find + Add candidate.
You can also source candidates to your Teamtailor account directly from external sites, using our Chrome extension. Read more about it HERE.