What slow down my android – performance finding

There are many processes that are working in the background. Usually android works the fastest just after whole re-installation – then after installed each application it is going to be slower and slower. Last time I’ve observed that after some shopping my phone slowed too much.

I tried to understand what application I’ve installed last day – there was no application but…. I’ve used ebay and aliexpres to buy some stuff. Then more and more notifications comes to my notify area on the phone.

I’ve tried to remove permission for notifications:

<Finger from top to middle screen> Settings->Applications->

AliExpress -> Notifications -> [DISALLOWED]

eBay -> Notifications -> [DISALLOWED]

After this my screen was again responsible