Some Web sites have, shall we say, unfortunate choices in fonts. If you run across a site where the font is too small to read, you can choose View > Zoom In or press Command-+ (the Shift key isn’t necessary to get the + symbol; Command-= is the same). But that zooms the entire page, both text and graphics, and can result in a jumbled-up page. To increase just the size of the text on the page, leaving the graphics alone, press Option and choose View > Make Text Bigger or press Command-Option-+. If necessary, similar commands make text smaller too.
