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The complete guide to ChatGPT ads (2026)

Every so often, a new advertising platform arrives that genuinely changes the game. Google did it in 2000. Facebook did it in 2007. TikTok did it in 2020. In 2026, it’s ChatGPT’s turn. Since OpenAI began testing ads in February 2026, ChatGPT has moved from a subscription-and-free-tier…

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How Google Ads actually work in 2026, and why most accounts are quietly wasting money

How Google Ads really work in 2026, including automation, Performance Max, rising costs, and why most businesses waste budget by using outdated strategies. Written by Castle, a UK digital marketing agency.

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GEO and SEO in 2026: how search really works now, and why most brands are already behind

An in-depth guide to GEO and SEO in 2026, explaining how AI search works, why rankings are changing, and how brands can stay visible in generative results.

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How paid social media advertising works in 2026

A clear, intelligent breakdown of how paid social media advertising really works in 2026, from AI-led targeting and creative strategy to attribution, rising CPMs, and what brands must do to make paid social perform.

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The future of eCommerce marketing in 2025 and beyond

ECommerce has evolved faster in the past five years than in the two decades before. With online competition at an all-time high, success now depends on more than just good products or ads — it requires data-led strategy, seamless website design, and measurable performance marketing. At Castle, we help eCommerce brands scale sustainably through results-driven campaigns, conversion-focused design, and real-time data optimisation.

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PPC for ecommerce: the ultimate guide

Pay-per-click PPC advertising can be very beneficial for promoting eCommerce stores. It has proven results for maximising leads and increasing revenue. Ideal for targeting high-intent customers, PPC is perfect for the data-driven nature of eCommerce. If you own an eCommerce store and have considered running PPC for eCommerce ads but…

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Are Facebook ads worth it for my business?

In this article, we answer the question 'Are Facebook Ads worth it for my business?'.

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5 reasons you need a Google Ads agency to run Google Ads for your business

Hiring a Google Ads Agency to manage the Google Ads for your business can be a game-changer. Read just 5 reasons why you need a Google Ads Agency to run your PPC ads.

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11 red flags to look out for when hiring a marketing agency

Don’t get stung by bad agencies, here are some red flags to look out for to help you avoid making a decision you’ll seriously regret.