As can be expected in a vector editor, any text you add to your Inkscape drawing remains fully editable as text at any time, despite any styling, filters, or transformations you apply to it. Creating and editing text objects is the domain of the Text tool where you can type or delete words, rewrap the text column (manually or automatically), apply style to parts of text, adjust kerning and spacing, and so on.
Of course, Inkscape is hardly competitive with programs that are specially designed for text, such as text editors or word processors. It is not too convenient for handling large pieces of text; since it is more visually oriented, Inkscape has no structural formatting tools such as automatic headings, footnotes, and so on—all this has to be emulated by manual styling and formatting.