Your cheatsheet is off to a good start. You are keeping things simple, which is the best trait cheatsheat can have. It's the first and only thing players really get to after they get auto-filled to a support role and chaotically search this site for any kind of help (more notes would certainly not hurt though). Your item section can however benefit from some extra content!

★ I like the short descriptions in your summoner spell cheatsheet. Quick and simple - as they should be :)

★ Your rune section could use some of these quick descriptions too. Ideally nothing too long (that's what your rune chapter deeper in the guide is for) - you shouldn't want to try & explain every single rune. But, it's a good way to tell your viewers some quick changes they should be considering when in champ select. Something along the lines of "switch Conditioning for Second Wind against heavy-poke lanes" or you can give a brief explanation of the playstyle intended for the current rune set like "ideal rune set for X build/strategy or against particular team-comp".

★ Same goes for your item section!

★ On the topic of the item section - that's the part of your cheatsheat that could use some refinement. You are presenting finalised fullbuilds and I think that's cool! But what starting items should a support poppy player start the game with? What should be the item they want to rush? What should they buy on their first recall? What boots are good on Poppy and in which situations? What Bounty of Worlds upgrades are viable? Which elixir to go for post-full-build? Try to expand on your item section and feel free to use blocks to organize everything so that players can see the progression of the build step by step!

★ Your "Threat and synergy" section is one giant ✨SLAY✨.

When it comes to presentation, your guide can see some improvement. Some chapters seem kind of chaotic and random. Text alignment often misses symmetry and colors are all over the place. However, I do certainly see a well-hearted intent behind all this - you are using champion icons, images, dividers, and colors to make your guide easier to read - AWESOME! Keep that up for sure. It's just that the final execution can benefit from refinement.

★Okay so let's start with your color-scheme. I see a lot of blue, orange, red, gray, green, and purple. That's... that's quite a lot, to be honest. Consider reducing the color scheme of your guide to just 1-3 colors to give your guide a sense of aesthetic and recurring theme.

★ Consider custom headings! Text-based headings are cool and all but let's be real, they are nothing when compared to the beauty of image-based headings! Just look at them side by side. Images have a way bigger impact on the reader, they can make the heading look more thematic, colorful, impressive, and/or exciting! It may appear like you need some huge photoshop skills to create these, and I'm not gonna lie - photo-editing skills can be really helpful. But even something as simple as a cropped part of Poppy's art with simple text on it can do the trick. To prove my point, here I made a heading entirely in Microsoft paint in 3 minutes :D In case you'd still be scared of it, you can combine the text-based Mobafire heading with an imaged-based one. It doesn't look as awesome as a full-image heading, but you know what? It doesn't look bad at all. Here are a few examples of what that could look like.

★ Another way to add a sense of thematic to your guide would be to simply recolor all that blue text in your guide with something more fitting to the color scheme you want. I know recoloring tens of words can seem like a lot of work, but see for yourself how much more alive the guide becomes! You can even use Microsoft word's "replace tool" to do all the repetitive work for you. Trust me it can save you a lot of time :D

★ Your item section is kind of messy to be honest. I see what you're going for, but try to consider a bit cleaner and more readable layout. The main issue is the item icon interrupting the text and the italic description next to it, which doesn't stand out well enough. Try to think about different ways to structure it. If it comes to worst, "Making a guide" provides an extensive library of clean coding templates.

★ You often list an enormous series of champion icons right next to each other. It's always good to provide a few examples, but too much can break the flow of the text :p

★ The structure of your experimental itemization section doesn't quite vibe with me tbh. Your content is getting squished to the left side, while the other remains entirely blank. I guess that you probably plan to add something there in the future - but this style of formatting doesn't support this mindset, I'm afraid :d

★ Your guide overall has a bad habit of breaking the symmetry. Stuff on one side overflows in comparison to stuff on the other side - and the text doesn't align well - leaving big blank chunks and breaking the clean look. Don't get me wrong, asymmetry is cool and all - but in guide-making it's usually disecouraged.

★ All these stretched out rectangles in your guide... I am not really a fan. I mean, I can see what you're going for here and the idea is awesome - I just don't really think rectangles are the way to go. First of all they all have slightly different width which looks slightly off. But what's worse, they take A LOT of space from your guide. I would either recommend leaving them entirely, or replacing them with something thinner, while reducing the text offset slightly.

★ Your rune section is probably the weakest part of your guide right now. It's really bright, chaotic, and the text is kind of difficult to read. Also, it is not really recommended to center the text-alignment in longer parts of the guide as again it severely breaks the symmetry and it's really hard for eyes to read. Imagine if books had their text centered :D The table itself is also slightly to the right which seems mildly infuriating if you ask me. Honestly, I recommend a total overhaul for this chapter - I can't really think of easy ways to save this layout :/

★ I see you're using images in your guide - GREAT! Images are a key to an easy-to-read guide. However, try to adjust the size of it so that it doesn't take the entire screen - "width" trait allows you to adjust its size without messing with the ratio. You can also put the images to the side and let the text flow around it for extra clarity!

★ Your "Conclusion" chapter feels a little tasteless. Consider adding a nice image or something there to make it feel more fun :D

★ Btw I really enjoy some of the custom images you made, including that map drawing - it adds more joy to your guide for sure!! <3

Content-wise I think your guide covers most of the basics somewhat well. And I don't doubt you know a lot about support Poppy and that you have a lot of wisdom to share. With that said I think there are still a lot of ways in which you can expand and increase the number of your content to teach your readers more than "just" the basics, while at the same time expanding on what is already there.

★ For your first chapter I am pleasantly surprised just by how many reasons to play / not to play you have managed to find - well done here!

★ Your item section mentions and explains a lot of items, but quite a few of them have very brief explanations. Is there really not much else you can tell us? Consider explaining how and why they work on Poppy. What makes them so efficient, when should they be bought, and how to get the most value out of them? You have a lot of knowledge, so don't be afraid to share it with us :D

★ I like the extensive detail you go into in your keystone chapter, despite the formatting dragging it down.

★ Your other runes are however explained only very briefly. Why don't you tell us more? When is X rune better than Y and when is it the other way around? Why is X so good on Poppy? Feel free to mention all the awesome interactions different runes have with your kit, for example Hammer Shock instantly procing the Cheap Shot. Which rune combinations are good and which don't work well together and how do they interact with your items?

★ Among the more basic mechanics that are left sort of unexplained are summoner spells. You mentioned them in your cheatsheat, but the guide itself is a great space to get more in-depth about them. Why is Flash so good? What can you do with it? Is it a must-pick? When is Exhaust better than Ignite and vice versa? What are their weaknesses and how can you incorporate them into your kit?

★ I would also really like to see a chapter explaining Poppy's abilities. What do they do? How best to use them? How to chain them together? When to save Steadfast Presence and when to use it just for the movement? You can even embed short videos directly from League's website to give your readers an idea on what do they do.

★ You briefly touched on positioning and laning, both very important. But there is still a lot of potential for guide expansion in terms of more mechanically based topics. Roaming, Laning phase, Mid-game, Late game, Warding, Engaging, Playing from behind, Teamfighting, Level 2 advantage, trading, combos, and Recalling are among the best ways you can start increasing the amount of content in your guide!