The term "intermediate level" can refer to a number of different things, but when it comes to English proficiency, it generally refers to a level of ability that is somewhere between beginner and advanced. An intermediate level English speaker typically has a pretty good grasp of the basics, but is still working on becoming more proficient in all areas.
If you're not sure where you fall on the spectrum, there are a few things you can keep in mind. For one, an intermediate level English speaker is usually able to hold at least a basic conversation on most topics. You're also likely able to understand the majority of what you read or hear, though you may still come across the occasional word or phrase that you're not familiar with.
As far as your own abilities go, you should be able to express yourself relatively well in English at an intermediate level. You may still make the occasional mistake, but you should generally be able to get your point across without too much trouble.
If you're looking to improve your English skills, there are a number of resources that can help you reach the next level. In addition to practicing as much as possible, you may want to consider taking an English course or tutorial specifically designed for intermediate learners. With some time and effort, you should be able to reach the advanced level in no time!