Every main starts with an h1 and it sums up the main idea of the page. People want to get straight to the point in your H1

Seperate content into sections using headings in sequential order H2 comes after H1

People come to websites for something specific noth for leisure reading.

Users should be able to scan the headings of your page to get the main ideas of your website without having to read any paragrpahs if they want to read paragraphs they will.
Make sure you don't skip heading numbers for aesthetic. You always start with H1 don't skip to H3 because it looks better. H1, then H2 then H3. go in order.
If we have a group of things to put together put them in a list because people are more likely to read things in lists.
Keep paragraphs short and to the point.
Provide links to relevant content if needed.
At a minimum each page should end with a link to the next thing you want your users to do. This is a call-to-action.
Links should be attached to an anchor text that describes what the user will see if they click the link. Don't use generic words like "click here" or "link" in favor of words that accurately describe the link.

To make a two column layout, I need a row that contains one div that spans columns of the grid that add up to twelve.

To make a two column layout, I need a row that contains two div that spans columns of the grid that add up to 12.

To make a a three column layout, I need a row that contains one div that spans columns of the grid that add up to twelve.

To make a three column layout, I need a row that contains two div that spans columns of the grid that add up to 12.

To make a two column layout, I need a row that contains two div that spans columns of the grid that add up to 12.