Leonid Kravchuk won the 1991 election with 61.6 per cent of the vote and became the first president of Ukraine.
Popularity of President of Ukraine Zelensky, Yushchenko, Kravchuk, Kuchma, Yanukovych

2016 - 2021
President Kravchuk began to be actively published and mentioned from May 2020, and the dynamics of publications about him keeps the bar above 5,000 pages in Google per month.
Leonid Kuchma won the 1994 presidential election over his predecessor with a 52.15 per cent result. Despite the falling level of trust of Ukrainians, Leonid Kuchma won his second presidential election in 1999 with 36.49 per cent in the first round and 56.25 in the second. At present, the number of papers recalling Leonid Kuchma is falling rapidly and is hovering at 900 publications per month.
Fig.2 number of URL pages in Google about Leonid Kuchma for the period 2016 - 2021
Viktor Yushchenko became president in 2004, receiving 51.99% of the vote in a runoff election.

Fig.3 number of URL pages in Google about Viktor Yushchenko for the period2016 - 2021.
We observe the average dynamics of about 2500 publications per month, among which the authors such as: Deutsche Welle, Editorial Board of LearnVse.ru, Igor Yakovenko, RIA Novosti Crimea, Interfax.ru, Iryna Poluboyarinova, Andriy Sidorchik, 'Ukraine.ru', EADaily, LB.ua and the like are at the top of the list. Even though the authors of LB.ua published more than 476 pages about Viktor Yushchenko, almost no one reads their materials, which again raises the problem of seo promotion and content visibility in Google, which is covered by Strungar A.V. in his works. It is not read, because of the position and optimisation of web resources, incorrect linkbuilding, and the like, lead to low visibility of the site in Google space.

Fig.4 List of top authors by the number of publications about Viktor Yushchenko and the number of their readers.
Main events of the day in Germany, Russia, Europe, Belarus, Ukraine, Central Asia. News, analytics from Deutsche Welle is the leader in content quality in Google search engine. According to the evaluation of systems of analysing the quality of content and internal hyperlinks exceeds the index 87 out of 100, which allows to assert the trust resource at the highest level. Viktor Yanukovych won the 2010 presidential election with a result of 48.95 per cent. In 2011, 30 per cent of Ukrainians retained confidence in the head of state.
Fig.5 number of URL pages in Google about Viktor Yanukovych for the period2016 - 2021
Petro Poroshenko won the 2014 Ukrainian presidential election in one round, he received 54.7% of the popular vote. Over the past 5 years, almost one million pages on Google. Petro Poroshenko's popularity in search engines is at a high level and so far, is the highest among other former presidents.

Fig.6 number of URL pages in Google about Petro Poroshenko for the period 2016 - 2021

Fig.7 List of top authors by the number of publications about Petro Poroshenko and the number of their readers.
Volodymyr Zelensky became the president of Ukraine in 2019. In the second round of elections, he received 73.22% of the votes. In February 2020, according to the indicators of the radiosvoboda website, 51.5% of Ukrainians trust him as the head of state, and 41% do not trust him. Let's take a closer look at the statistical data about the President of Ukraine Volodymyr Zelensky for the last 5 years according to the analytics and monitoring systems of Google (Ahrefs).
Fig.8 Number of URL pages in Google of Vladimir Zelensky for the period 2016 - 2021 in Russian language

Fig.9 Number of URLs of Vladimir Zelensky's Google pages for the period 2016 - 2021 in Ukrainian
A good example of how active advertising campaigns and media outlets were in spreading the word about Volodymyr Zelensky a year before the election, peaking at the same rhythm today. In order to win the presidential election in Ukraine, it will be necessary to publish almost 500,000 pieces of material in various resources, or in other words URLs where information about Volodymyr Zelensky was disseminated. Currently, we have a stable dynamics that media and materials about the sixth president of Ukraine, which are distributed in Google, are performing at a high level. We can assure that any information that Volodymyr Zelensky wants to bring to the people of Ukraine will be seen and read.

Fig.10 List of top authors by the number of publications about Volodymyr Zelensky and the number of their readers in Ukrainian.
From the list we can conclude that LB site is on the first place, but if we compare them with Deutsche Welle, the number of publications is 3 times less, and the number of interested people who go to them and read information about Volodymyr Zelensky is 10 487, when in LB we have the figure of 11 401 with 5 307 pages. It is interesting that the number of users of the author of Toronto Television is almost the same as the channel 1+1 from Google search, and political scientist Oleg Leusenko, was able to produce a publication that received as many as 625 hits from organic Google search, which speaks of a relevant publication or topic that was able to interest users and go to his page on the established keywords.
Fig.11 List of top authors by the number of publications about Vladimir Zelensky and the number of their readers in Russian.
Let us consider Fig.11, from which we can see that the first positions are occupied by such resources as: Deutsche Welle, Interfaxru, RBC, news agency EADaily, Commentary Ukraine and so on.
If we talk about the most visited sites that publish materials about the President of Ukraine, according to queries about Volodymyr Zelensky in the Google search engine, we will have a different situation, shown in Fig. 12.

Fig.12 List of top sites by the number of web pages about Volodymyr Zelensky and the number of their readers.
The first place is occupied by the site liga.net actively publish materials monthly, although the first place for publications is gordonua.com, but because of the lack of positions in the search engine, loss of key queries, loss of traffic, the effectiveness of publications has a low level. Of course, the impact of the quality and relevance of content, but in Fig. 13 we see a downward trend, we would recommend to optimise the web resource and deal with the external promotion of gordonua.com.

Fig.13 dynamics of gordonua.com website development by keywords and organic traffic
Over the last 5 years with the development of digitalisation, we have such results of popularity of Ukrainian presidents in Google by the number of publications, the first place is occupied by Volodymyr Zelensky, the second place is occupied by Petro Poroshenko, then Viktor Yanukovych, Leonid Kravchuk, Viktor Yushchenko, Leonid Kuchma. This position of the presidents of Ukraine is due to the development of Internet technologies, which help information to be disseminated, through Internet representations, without restrictions, using Google search. Also, the impact of printing web pages with various news is influenced by the activities and decisions of the presidents of Ukraine, which creates an Internet boom on this or that news. The most prepared for the election, for example, was Volodymyr Zelensky, according to the indicators in the graphs. Publishers, a year before his presidency, began to actively pour into the Internet space publications about his activities and personality in general.
To maintain the ratings of presidents, they need to influence and describe their activities in the Internet space, because the list shows that Kravchuk, being the first president of Ukraine, was able to take 3rd place in the rating. Materials are published about him even today, and the dynamics of new materials is only growing, his activities are gaining momentum and internet publishers are publishing more and more new web pages on Google. News channels provoke people to be more interested in this or that information, and websites that publish news and strengthen them in Google's search history.