4 Types of SEO: AEO, GEO, LLM, Parasite SEO

Many people have asked this query on ChatGPT – “Isn’t SEO just one thing? Then why do I keep hearing names like AEO, GEO, LLM SEO, Parasite SEO, etc.? Is AEO, LLM, GEO, Parasite SEO — do we have to follow the same principles or are they different from SEO we do..?”

Valid question!

For an SEO expert, doing this for almost a decade, it’s quite difficult to digest the fact that traditional search experience is changing dramatically, at nearly 299792458m/s i.e. at the speed of light.

According to Neil Patel and his research findings — A global study in 2025 found that nearly two-third (63%) of all purchasing journeys now begin with a Google search.

Yet, it is hard to digest the fact that how the algorithms and strategies that worked two years ago are no longer effective now.

Now every search has two realities of results.

Traditional Searches

1. 10 Blue Links
2. Ranking Determine Visibility
3. Clicks As Primary KPI
4. Position = Power
5. CTR model

AI-Powered Searches

1. Direct Answers With Citations
2. Being Named/Cited Builds Visibility.
3. No Clicks Needed For Brand Exposure
4. Mentions = Mindshare
5. New Attribution Model Emerging

In order to cope up with the two model, it’s important to understand the dynamics of how SEO is evolving in 2025. I understand that SEO has evolved, and that’s the reason why we are hearing all these different terms.

Let’s breakdown the definition of these terminologies for quicker understand:

1. AEO = Answer Engine Optimization – which focuses on getting your content featured as a direct answer in search results. Previously, it was “Featured Snippet”, but now it’s more of an AI-overview and AI-mode on Google.
2. GEO = Generative Engine Optimization – It’s about optimizing content so that works well over ChatGPT, Gemini, Grok to consider them as a relevant source of information and do citation for your links.
3. LLM SEO = Language Learning Model SEO – Is about optimising your content specifically for large language models in the form of listicles, structured data in the form of schema, which LLM bots understand and use it for AI. That’s the reason why Schema is having more importance in 2025.
4. Parasite SEO – It’s like a virus running over other’s authority to build the reputation over your content. it’s like a Black Hat SEO where you do all sort of unethical practises to please AI for ranking.

Even though they share some principles with traditional SEO, each of these has its own unique angle and strategy in the long run. One must understand their importance and get trained with the latest trend, or else get sunk in the feeling that “I’m safe”.

Steps need to be evolved based on what’s your priority.

Yesterday I read an article about LLM.txt implementation, AEO and GEO.

Sharing a few insights what I understood:

For AEO

Do this for sure: Implement Schema Markup by adding a FAQPage or HowTo schema for the service pages. Speak in the language what AI-bots understand well.
Use tools like AnswerThePublic to identify queries, In blogs, start with H2 sections answering directly the question which is popped up in AnswerThePublic.
Use structured snippets like a numbered lists, tables, and bold key phrases.
Track impressions in Google Search Console for AI Overviews.

For GEO

Use polls/questions to encourage AI-friendly engagement. This helps as AI-bots eats on surveys conducted on reputable sources.
Use conversational tone like writing blogs in natural language than multi-processed content. No need to stuff keywords as now the game has changed.
Always test out your visibility on AI tool. For me, the query on ChatGPT is “Best hospital planning consultants India”, where I will check citations if I am in the right direction.
You need to repurpose your content for the platforms. For example: share a blog snippet on LinkedIn (from your strategy) and Medium, and don’t forget to backlink your website here.
Build Authority Signals by citing relevant sources. For example: As I’m planning to do AEO, GEO and other SEO for a hospital brand, I’m about to insert sources like NABH guidelines or KPMG reports in content. This will build credibility for the blogs. Secondly, don’t miss to add author bio. This will explain who’s speaking about the article and what’s his experience is in this field.

For LLM SEO

Do a validation check for your efforts every 6 months for checking the originality of content with Copyleaks, test the same in Claude or Gemini for accurate summaries, and see if your brand is recognised as a valid source for the same.
Don’t use jargons, instead try to explain a concept in “Conversational & Simplified Language”. Ultimately, you’re writing the content for human, so target human on priority. Even these LLM models are modifying their tone to be more human.
I will implement LocalBusiness schema on homepage and will use Article or FAQ schema for my blogs. For this I use – Google’s Structured Data Markup, Rich Results testing, and Schema Markup Validator and Generator. Search them on Google, they are freely available for use.
As I’ve told earlier that LLM SEO optimizes for models like Gemini with structured data, listicles, and schema. So, my strategy with my current client is pretty simple. I’m going to use Listicles & Structured Content by formatting my blogs as “Top 7 NABH Accreditation Steps” or tables for “Capex vs. Opex Breakdown”, as this helps LLMs extract info easily.

For Parasite SEO

Lastly, monitor the ethics by ensuring originality as it is a high-quality content with no keyword stuffing. Track backlinks in Semrush to avoid over-reliance on the manual finding for guest blogging sites in the niche.
Work on UGC (user-generated content) for local business and website, like getting reviews and testimonials from clients and sharing their case studies like a story, and ask them to appreciate the content.
Take the leverage of social forums like posting a value-added content on LinkedIn, Reddit or Quora. Don’t try to build backlinks on reddit, or your account will get banned.
Game is simple, yet effective. Start link building in your niche specific guest blogging sites. Follow their guidelines and do an effective link building for next 2-3 months.

The truth is, SEO is no longer a single playbook — it’s an evolving ecosystem where AEO, GEO, LLM SEO, and even Parasite SEO are shaping how brands get discovered in 2025. While the fundamentals of good content, authority, and trust still matter, the way search engines and AI models interpret and display that content has changed dramatically. To stay relevant, businesses need to adapt, experiment, and embrace these new layers of optimization. The future belongs to those who understand that SEO is not dead — it’s just reinventing itself at the speed of innovation.