An essay (thank you so much in advance for corrections)
Advertising, nowadays, is the main part of a good business. Advertisers try to make such an advertisements which could that encourage people towards its their goals. But The question is if it how much can one/we be known much learn about a country by through its advertising. I think by through advertisements, one can learn to some extent about the country but not a lot. In this essay I will discuss the this point of view.
Every country has its traditions, culture as well as maybe a dominant religion. Some of these views can be realized in advertisements. For example, about through advertisements in an Islamic country like Iran, one can find see/learn how women and men have to be must dressed. or in India how people dress The same is true for/in India. Another good example of what we can possibly learn is in through advertisement it may be possible to can find about the New Year which is taken place with Christmas or with other ways like Eide Norouz in Iran or about some traditional ceremonies like some dragon ceremony in China is the religious and cultural traditions of a country. You/One might see references to traditional dragon ceremonies in advertisements in China, or to Eide Norouz in those/advertisements in Iran. In other countries you/one might see images of Christmas and New Year's traditions. In addition, there are other things like hotels, famous cities, entertainments and so on which can be known seen in advertisements.
But However, it is acknowledged that advertisements always show things in the best way not the realities and don't always portray reality. For example, a person maybe can might decide to visit the a country by watching because of/because they were inspired by an advertisement but this is not reasonable one to want to decide to live there because there are many things which can be known just by living in that country it wouldn't be reasonable to base a decision to move to a country on what is shown in advertisements because there are some things that can only be learned by living in that country. (instead of the word "because", you could also insert a semicolon "For example, a person might decide to visit the country because they were inspired by an advertisement but it wouldn't be reasonable to base a decision to move to a country on what is shown in advertisements; there are some things that can only be learned by living in that country.")
In short, in my opinion, advertising can help to know a country to some extent but not a lot because their goal is to show the country in the best way possible light using tricks and beauties so as can be seen is not as is reality the goal of advertising is not to show reality, but to use selective focus to show a country in the best possible light.