One can not use only HTML to create a fully responsive web page because HTML is the skeleton of a webpage. HTML hardly interacts with the visitors, CSS and Javascript are like muscles because they are adding more interaction then probably HTML will ever have. CSS media code allows you to define styles for different screen sizes and orientations, making your HTML elements adapt accordingly and Javascript can make them interact even better.

The search engines try to judge each website depending of many things (about 200 of them) like their loading time, their structure and their content.

If you are search tutorials in general and web design & SEO tutorials in special using the search engines you will find many written and video tutorial like this one and many will tell you that they are the best and they are telling you how to really do your job to become the best or the number one.

Some people are saying that using Artificial Intelligence in general or chatGPT in special for SEO is a good thing and because of it fast rankings have never been easier but it's stupid.

Short version is saying you to write better and write often, you should check the size of uploaded / used images and videos on the website on in each blog posts, you should check the website structure and website loading time as often you can check them (weekly or even daily if you are writing daily or several times a day each day).

To keep it simple, you can place each HTML element on different places on screenfloating across other HTML elements.

All links to one website (backlinks) are telling people and search engines that your website and its pages are "there" (whatever the URL is). The best way to get backlinks to your website is to keep writing the best you can write, to keep promoting the website on social media (websites like Twitter and Facebook) and on other websites leaving comments.

In one word yes, you'll have more traffic, but you can have only one blog with different categories, you need a good SEO for each of them and you need to promote your articles.

The content you are adding / posting on your website is important or even essential how some people consider it. Writing / posting it using the desired keywords selected for every article before you start writing it will make the articles easier to find on search engines.

The URLs from your website do matter for SEO because they provide important information to search engines and users about the content of the targeted web page. Their length and their words do count, but you need to make them readable because things like "https://dan-marius.ro/en/why-do-urls-matter-seo" for this article as example means more easy information for any user and any search engine than things like "https://dan-marius.ro/en/article.php?id=755" (it's just an example, don't try to hack the website with that - or something else, to be realistic - because you'll easily fail).

You should always or at least often study your competition, keep posting interesting stuff on your website or your blog and try to be cooler than your competition.

Having a good SEO will make it load fast and be found easier using the search engines. Having good prices, good products and good delivery will make its clients happier.

If you go for a website developer you may get a lower payment than using a company or a website developer on his or her own. You may also get a big number of beginners wanting some easy money on that platforms.

The responsive web design is done when the website is detecting and adapting to the visitors screens.

If you are a beginner website designer you can go and watch the video. Its's Ok for a beginner.

First of all, I am not selling websites, I am only desigining them of I am extending them developing Joomla extensions that can be installed and used on them.

Keep writing on your website as often as you can write them, daily if it's possible, and always improve your website if you can.

To be very short you need all of them. You need as many as you can get or create yourself.

To make the long story short you should find an SEO agency or freelancer. Search them with Google, Bing or any other search engine like Tor. The better they are SEO experts better they are optimizing their website or websites in search engines (that's where SEO it comes from, it means Search Engine Optimization) and higher they are in the search results.

It is not easy to find a professional keyword researcher. You should go to the freelancing platforms and search his or her there or search that person using Google or Bing search engine. If he/she is so professional theor or her / his website will be first or in the first page.