AI system prompt guide 2026 with terminal icon on dark blue and purple abstract gradient background, tutorial on how to write and use system instructions for AI models.

What Are AI System Instructions & How to Use Them for Better Results?

AI system instructions are one of the most powerful yet underused features in modern chatbots. They let you define how an AI responds to you, every single time, without repeating yourself in each conversation. Used well, they eliminate the most common frustration with AI: getting generic responses that require constant correction. Yet most people never […]

How to use AI with PDF — complete 2026 guide covering merging, compressing, protecting and more

How to Use AI with PDFs to Edit, Convert, and Analyze Files [Complete 2026 Guide]

Over 3 trillion PDFs exist worldwide according to Adobe estimates, and most people still deal with the same problems: merging scattered files, shrinking bloated attachments, and locking down sensitive documents. Traditional PDF tools solve these tasks one at a time, usually across three or four different websites. AI changes that completely. The best tool for […]

How to use AI in Excel — complete 2026 guide covering Copilot, Fello AI, ChatGPT and more

How to Use AI in Excel to Create and Edit Spreadsheets [Complete 2026 Guide]

78% of organizations worldwide were using AI in their workflows as of 2024, according to McKinsey’s Global AI Survey,, and Excel remains the most widely used data tool in business. Yet most people still build spreadsheets the hard way, manually typing formulas, cleaning data by hand, and formatting cells one by one. Microsoft’s built-in Copilot […]

A graphic depicting several overlapping dark-themed app screens on a green circuit board background, demonstrating how to convert study notes into videos and podcasts using a tool like NotebookLM. The screens show options for 'Discover sources,' 'What are you interested in?', and adding sources, with checkboxes and an 'Import' button.

NotebookLM Update: 1M-Token Chat, Goals, Saved History

Google NotebookLM has had one of the most packed update cycles of any AI tool in recent memory. Since October 2025, the platform has shipped six major upgrades, including Deep Research, a Gemini 3 engine upgrade, built-in slide editing with PPTX export, and the brand-new Cinematic Video Overviews that launched in March 2026, powered by […]