When creating a site, questions arise on what screen resolution should be targeted, what browsers will need to maintain the site, as well as some others. Many developers are guided by the advice of colleagues who can found on the Internet, but unfortunately, most of these boards out of date. Council five years ago in any case can not follow, as the technology over the years have gone far ahead. For example, are often advised to focus on 800×600 screen resolution, and such tips can be seen even in modern materials. However, a simple analysis shows that such a resolution uses about five percent of users, and over ninety percent uses a higher resolution. Of course, you should check that site at 800×600 works correctly, but it is quite possible presence of a horizontal scroll bar. If, however, rely on that resolution, as the primary, the vast majority of visitors will see large empty strip that does not decorate a web page.
Similarly, the situation is and determining the browser. You can still take some steps to site work correctly in Internet Explorer version 5, though this version uses less than two percent of visitors, but it is unwise to take any steps to support users of Netscape Navigator, because today they are less than one-tenth percent. That is, the web-master, are inserted into the code of the page instructions to support Netscape Navigator, automatically adds useless for the vast majority of code that leads to an unjustified increase in load time. By the way, browser Opera Mini, which is used by approximately two percent of users who undeservedly ignored by many creators of sites. But the focus on emerging technologies, not outdated, but will improve the quality of the site.
About the number of colors also sometimes have issues, but much less frequently. Today, virtually impossible to find a monitor that displays less than 65K, so the optimization of the image to 256 colors does not make sense. If you building a website is important, what operating system will use the visitor, it is likely that this will be Windows. All other systems together occupy a small proportion, with non-Windows users systems often have a more highly skilled and able to solve arising from some incompatibility problems. When creating a site should focus on the features of today's users and choose parameters, based on current statistics. Advice given some years ago, should be taken with a sufficient degree of skepticism. And the advice given today, too, should be checked, since the person who gave them, can not adapted to the realities of the modern Internet.