AI Text To Video: The quota that you can use to create AI-generated videos.
AI Text To Image: The quota that you can use for creating Al-generated images.
Text To Speech: The total character limit for text-to-speech conversion.
AI Script: The quota that you can use for AI script.
Auto Subtitle: The maximum transcription time available in the billing period.
Remove Image Background: Quotas you have for removing image backgrounds. Quotas will be deducted after successfully removing the background.
AI Translate: The total character limit for translation.
AI Audio Noise Reduce: The quota that you can use to reduce audio noise.
AI Vocal Remover: The quota that you can use to separate vocals from audio.
In short, credits/quota are the number of times or limits you can use each AI feature. Check more details here: https://www.flexclip.com/pricing.html.