-Also is commonly used in writing, but is less common in speaking. Also occupies different positions in a sentence. We use 'also' in front position to emphasis what follows or to add a new point or topic for example: "It’s very humid. Also, you can easily get sunburnt." -As well is much more common in speaking than in writing, and is more common in speaking than the word 'also' all together. 'As well' almost always comes in end position for example: Customer orders, "I’ll have steak please," but decides last minute to add a item. "And I’ll have the mixed vegetables as well." I hope that was helpful though Regev explanation is also fitting.