What are the most important SEO factors building a blog?

Hey all,

I need to build a blog to add on to a website I've developed on bubble.io. It doesn't need to be anything fancy, but obviously SEO is a huge factor for it (the content will definitely be interesting enough too!).

What are the main things I need to factor in when developing a blog from an SEO perspective?

Additional points if you've got any pointers specific to Bubble.