> ## Documentation Index > Fetch the complete documentation index at: https://docs.zazubot.com/llms.txt > Use this file to discover all available pages before exploring further. # Overview Blocks are the atomic building blocks of a zazubot chat. You can chain any blocks together to create complexe conversation flows. When you drag and drop a block in the zazubot flow, by default it will be inserted into a group that can have a title. Blocks are always contained in groups. There are multiple block categories to make it easier to find the right block for your needs: ## Bubbles Bubble blocks are used to show bubbles that can be used to display information to the user. Bubble blocks ## Inputs Input blocks are used to ask the user for input. It will stop the conversation and for the user to provide input. Input blocks ## Logic Logic blocks are used to perform background operations. They are not visible to the users. Logic blocks ## Integrations Integration blocks are used to trigger external services operations. Interested in implementing your own integration block? Head over to [The Forge](/) to easily create your block. Integration blocks