--- title: Merge placeholders description: How to use merge placeholders --- [Skip to content](https://support.postworks.co.uk/knowledge/sp-merge-placeholders#main-content) ![Logo (transparent background, red emblem, red text, tagline NOT included) (PRIVATE).png\]](https://support.postworks.co.uk/hs-fs/hubfs/Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png?height=40&name=Logo%20(transparent%20background%2c%20red%20emblem%2c%20red%20text%2c%20tagline%20NOT%20included)%20(PRIVATE).png) Open main navigation Close main navigation - [Postworks Portal](https://app.postworks.co.uk/dashboard/send) [Postworks Portal](https://app.postworks.co.uk/dashboard/send) Hello. How can we help you? - There are no suggestions because the search field is empty. 1. [Support Centre](https://support.postworks.co.uk/knowledge?hsLang=en) 2. [Merge API](https://support.postworks.co.uk/knowledge/merge-api?hsLang=en) # Merge placeholders ## How to use merge placeholders Placeholders are defined by `{#identifier#}`. The identifier needs to have a maximum of 64 characters and needs to be a node, column or object in the respective data file. 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