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Flexbox and CSS Grid are tools that make life easier for the developer. Almost all modern Internet browsers currently support them, and layout has now become much faster and easier. Flexbox is a set of intersecting horizontal and vertical lines that divide the space of a grid container into areas into which grid elements can be placed. Grid cells can be created with fixed sizes (px sizes), relative sizes (ememem sizes), and with flexible sizes (flex sizes) The number of lines of HTML and CSS code will be less. This means that we will solve all the basic problems of the layout faster.