The verb 'steady' means to stabilise or to prevent something from moving or changing. As an adjective, something which is described as steady is balanced without shaking or moving or is firmly fixed or supported. A steady increase or decline refers to continuous growth or reduction over time. You might tell someone to 'steady their nerves' which means you are asking them to calm down. In a more colloquial informal context to 'be steady' or 'go steady' with someone means to date someone over a period of time.

1. As he carried the full glass to the table, the waiter kept a steady hand so that it wouldn't spill.
2. Mary was well respected as a doctor because of her skill and steadiness under pressure.
3. John didn't like his job, but he couldn't afford to quit as it provided him with a steady income. 
4. He was unsteady on his feet for several minutes after taking a blow to the head.

1. I am happy to report a steady increase in sales as a direct result of our new marketing strategy.
2. Using automated processes and social media software is a sure way to guarantee a steady stream of traffic to your social media.