Generate & Schedule Social Media Content with GPT-4 and Buffer from Google Sheets

Who's it for Marketing teams, social media managers, content creators, and small businesses looking to maintain consistent social media presence across multiple platforms. Perfect for organizations that want to automate content creation while maintaining quality and brand consistency. How it works This workflow creates a complete social media automation system that generates platform-specific content using AI and schedules posts across Twitter, LinkedIn, and Instagram based on your content calendar in Google Sheets. The system runs daily at 9 AM, reading your content calendar to identify scheduled topics for the day. It uses OpenAI's GPT-4 to generate platform-optimized content that follows each platform's best practices - concise engaging posts for Twitter, professional thought leadership for LinkedIn, and visual storytelling for Instagram. DALL-E creates accompanying images that match your brand style and topic themes. Each piece of content is automatically formatted for optimal engagement, including appropriate hashtags, character limits, and platform-specific calls-to-action. The workflow then schedules posts through Buffer's API at optimal times and updates your spreadsheet with posting status, content previews, and generated image URLs for tracking and approval workflows. How to set up Prerequisites:

Google account with Sheets access OpenAI API key with GPT-4 and DALL-E access Buffer account with connected social media profiles Slack workspace (optional for notifications)

Setup steps:

Create your content calendar:

Copy the provided Google Sheets template Set up columns: Date, Topic, Platforms, Content Type, Keywords, Status, Generated Content, Image URL Fill in your content schedule with topics and target platforms

Configure credentials in n8n:

Add OpenAI API credential with your API key Set up Google Sheets OAuth2 for spreadsheet access Add Buffer API token from your Buffer dashboard Add Slack API credential for success notifications (optional)

Update Configuration Variables:

Set your Google Sheet ID from the spreadsheet URL Define your brand voice and company messaging Specify target audience for content personalization Set image style preferences for consistent visuals

Configure Buffer integration:

Connect your social media accounts to Buffer Get profile IDs for Twitter, LinkedIn, and Instagram Update the Schedule Post node with your specific profile IDs Set optimal posting times in Buffer settings

Test the workflow:

Add test content to tomorrow's date in your calendar Run the workflow manually to verify content generation Check that posts appear in Buffer's queue correctly Verify spreadsheet updates and Slack notifications work

Requirements

Google Sheets with template structure and editing permissions OpenAI API key with GPT-4 and DALL-E access (estimated cost: $0.10-0.30 per day for content generation) Buffer account (free plan supports up to 3 social accounts, paid plans for more) Social media accounts connected through Buffer (Twitter, LinkedIn, Instagram) n8n instance (cloud subscription or self-hosted)

How to customize the workflow Adjust content generation:

Modify AI prompts in the OpenAI node to match your industry tone and style Add custom content types (promotional, educational, behind-the-scenes, user-generated) Include seasonal or event-based content variations in your prompts Customize hashtag strategies per platform and content type

Enhance scheduling logic:

Add time zone considerations for global audiences Implement different posting schedules for weekdays vs weekends Create urgency-based posting for time-sensitive content Add approval workflows before scheduling sensitive content

Expand platform support:

Add Facebook, TikTok, or YouTube Shorts using their respective APIs Integrate with Hootsuite or Later as alternative scheduling platforms Include Pinterest for visual content with optimized descriptions Add LinkedIn Company Page posting alongside personal profiles

Improve content intelligence:

Integrate trending hashtag research using social media APIs Add competitor content analysis for inspiration and differentiation Include sentiment analysis to adjust tone based on current events Implement A/B testing for different content variations

Advanced automation features:

Add engagement monitoring and response workflows Create monthly performance reports sent via email Implement content recycling for evergreen topics Build user-generated content curation from brand mentions Add crisis communication protocols for sensitive topics

Integration enhancements:

Connect with your CRM to include customer success stories Link to email marketing for cross-channel content consistency Integrate with project management tools for campaign coordination Add analytics dashboards for content performance tracking