Crochet patterns don’t always specify exactly where to work increases. Instead, they may say something like, “Increase 4 stitches evenly over the next 5 rows.” When spacing out increases yourself, it’s best to work them at least one stitch in from the edge of your project. This will make the edges much neater.
In the photo, swatch ‘A’ was worked with the increases at the very end of the rows, while swatch ‘B’ has the increases worked one stitch in from the edge. You can see the difference in how clean the edges look. Swatch ‘B’ is definitely neater finished product.