All I’ll be discussing with you below are the most generally accepted ways to increase page authority:

1. Produce Fresh Content Consistently

Fresh and quality content will always give your page a positive rank thereby increasing your page authority. Try to produce pertinent and high-quality content that is relevant to your line of brand or product or service.

2. Start with Keyword Research

Before writing your long-form post, take the time to find the best focus keywords on the topic, and also consider targeting keywords with less competition. Just make sure you complete this step correctly as it will ultimately determine the success of your content in search engines.

There are many amazing tools on the internet that will make your keyword research work easily.

Two of my favorite is Jaaxy.

3. Target Long-Tail Keywords

Now, you already know you must have a focus keyword while writing your long-form blog posts. But many people do not know that they should target long-tail keywords. These are keywords that are super-specific on any topic. Long-tail keywords are generally very easy to rank and drive in highly targeted traffic.

A very good tool for this purpose is a popular keyword research tool called Jaaxy, You can use the same tool to collect as many long-tail keywords as possible. But, if you're having trouble coming up with more of such keywords, then the "Related searches" section in Google is another good place to look into.