- **Columns build on the grid's flexbox architecture.** Flexbox means we have options for changing individual columns and [modifying groups of columns at the row level]({{< docsref "/layout/grid#row-columns" >}}). You choose how columns grow, shrink, or otherwise change.
-- **When building grid layouts, all content goes in columns.** The hierarchy of Bootstrap's grid goes from [container]({{< docsref "/layout/containers" >}}) to row to column to your content. On rare ocassions, you may combine content and column, but be aware there can be unintended consequences.
+- **When building grid layouts, all content goes in columns.** The hierarchy of Bootstrap's grid goes from [container]({{< docsref "/layout/containers" >}}) to row to column to your content. On rare occasions, you may combine content and column, but be aware there can be unintended consequences.
- **Bootstrap includes predefined classes for creating fast, responsive layouts.** With [six breakpoints]({{< docsref "/layout/breakpoints" >}}) and a dozen columns at each grid tier, we have dozens of classes already built for you to create your desired layouts. This can be disabled via Sass if you wish.