SEO. Search engine optimization of the site. Brief recommendations

SEO optimization. Promotion and promotion. TOP 10 in search results
Search engines rank sites in search results according to a certain coefficient of relevance (i.e., compliance) to a key query. There are more than 200 ranking factors used by SEO optimizers to promote websites. Using and taking into account all these 200 factors as much as possible, you can get a high-quality website that will meet the requirements of search engines.

SEO optimization Methods
Optimization methods can be divided into three classes:

White optimization is working on a resource without using officially prohibited methods of resource promotion by each search engine - without affecting the search algorithms of sites. You can find out about all allowed search engine optimization methods directly on search services;
Gray optimization - this can include adding a large number of keywords to the page text, often with loss of readability for a person, repeated repetition of key queries a certain number of times in different cases, singular and plural, as well as various forms of verbs, etc.;
Black optimization is all methods that contradict the rules of search engines. Among them are the following: the use of doorways (pages and resources created specifically for search engine robots, often with a large number of keywords on the page), a technique called cloaking (the user is given one page, easy to read, and the search robot is given another, optimized for any queries), the use of hidden text on the pages of the site, the use of "single-pixel links", etc.
Briefly about SEO optimization of websites
In general, if from the very beginning you make a site according to generally accepted recommendations and in accordance with the current HTML5 specification, which is validated without errors and warnings when checked by a validator, then the site will already be perfectly located by various search services, in particular, such as Google or Yandex. And although a properly designed and valid site does not mean that it is in the TOP 10 search results for relevant queries and according to the topic defined on the site, it still guarantees its possible success in indexing and appearing in search results, even if not in the top ten.

And in order for the site to appear in the TOP 10 search results, of course, it is necessary to pay due attention to its SEO optimization with all necessary measures to promote and promote it. This is especially true for commercial sites whose owners aim to make money using the site and make a profit at the expense of Internet users.

Some SEO optimizers use search engine optimization methods that are not always "honest" when, thanks to artificially added keywords or phrases on the pages, such a site gets into the TOP 10 of search results, but the site itself does not contain information useful to users. Now such "black" methods of search engine optimization are perfectly recognized by search services, which even block such sites, throwing them out of their search results altogether.

But any webmaster, web developer or web designer who works directly with HTML code can perform SEO optimization of a site for search services on their own, using very simple but effective enough methods to get into the TOP 10 search results. To do this, you only need to follow certain rules and recommendations that are reported by search services themselves, such as Google, Yandex, Yahoo, Bing and others. Below are just some, but the most important recommendations and requirements for SEO optimization of sites and, as a result, their possible inclusion in the top ten of search results.

Some recommendations for SEO optimization:
Use the original text on the site, which is not available anywhere else on the Internet;
The length of the <title> tag should be from 10 to 70 characters (including spaces);
The description meta tag must be between 70 and 320 characters long (including spaces);
Use the required alt attribute for images;
Use the title attribute for images;
Use only one <h1> tag per page;
Use the text length between <h1>-</h1> tags no more than 70 characters (with spaces);
Use a limited number of headings with <h2>-<h4> tags per page (recommended within 2-5);
Use a code/text ratio of no more than 20% (recommended no more than 10%);
Use key (thematic) words evenly across the content of the page;
Use the <strong> and <em> tags to highlight keywords in the content moderately and evenly on the page;
Use the number of highlighted keywords no more than 3-4% of the total amount of text;
Use at least 500 characters on the main content page;
The text should contain keywords that are in <h1>, <title>, description;
Set the correct language of your page (site), which has the most content created in the <html lang="ru"> tag (for example, Russian);
Be sure to specify the UTF-8 page encoding (this is the best option);
Make the URL more understandable to people and search engines (according to the content of the site or page);
Use the XML Sitemap Sitemaps;
Use the robots file.txt;
Use the Favicon (icon) for the site;
Use micro-markup dictionaries schema.org - which are read by machines;
Use Open Graph Protocol markup tags (for social networks);
Place the 404 error page in the root of the site;
Use no more than 3 external links on the page;
Use the attribute with the value rel="nofollow" for external links that should not be indexed;
Use linking inside the site (links from one page to another, but no more than one or two links per page);
Use one link to the main page of the site on each secondary page;
Use code compression (compression of HTML/CSS/JS files);
Optimize the images (reduce the size as much as possible);
Use Mobile Viewports (optimization for mobile devices);
Use the analytics tracking tool (Google Analytics, Yandex-metrica);
Make the size of the active elements optimal (link size for small screens);
The weight of any web page with all elements should not exceed 100Kbytes (preferably up to 50kbytes);
There should be no more than 50 links from one page to other pages of the site;
When clicking on the website logo, there should be a transition to the main page of the website from any other page;
When linking with an anchor, links must be made using a word or phrase that will correspond to the topic.
Additional SEO optimization
Register your site in search services (Google, Yandex, Bing, Meta, etc.) and in different site directories;
Maximize the number of active links to your site (or to its individual pages) from other sites;
Encourage users to visit your site (using the link to the site in social networks);
Use the main query (or keywords) in the first and last paragraphs of the text. Remember, paragraphs should be no more than 4 lines long;
Use markers and lists, highlighting important parts by numbering or in bold (<strong> tag);
Add like and repost buttons to any of the social networks on the site.networks that will attract the attention of new users.
WHAT NOT TO DO WITH SEO OPTIMIZATION:
Do not overuse the number of keywords on the page;
Do not overuse the number of words highlighted with <strong> or <em> tags;
The amount of HTML code should not exceed 20% of the total page weight;
Do not put circular links on the page (which link to the same page);
Do not use underscores in URLs (address_site with strikethrough) unless absolutely necessary;
Do not allow broken (empty, broken) links on the page;
Do not set the email address on the page as plain text;
Do not use or try to use minimally embedded styles (CSS inline);
Do not use or try to use minimal jаvascript scripts on the page;
Do not use Flash unless absolutely necessary;
Do not use iFrames unless absolutely necessary;
Do not hide the text from keywords by using a very small font or the background color of the page. Search services quickly recognize this and bypass such sites.